CN104933078B - A kind of Web five application pages rendering optimization method - Google Patents
A kind of Web five application pages rendering optimization method Download PDFInfo
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Abstract
A kind of Web five application pages rendering optimization method, this method is by first building a hiding DOM node element, simultaneously in hiding at least one child node of node elements internal drawing, while drawing child node, whether the combination for constantly detecting the DOM node and its child node constitutes effective status, once the element combinations that the child node of the DOM node element and its inside is formed constitute a scheduled effective status, batch calculating and rendering, disposable display to User Page are carried out to the child node of the DOM node element and inside by browser.The present invention's can avoid the problem that return time is long in existing page elements increment rendering intent, effectively reduces page load time, improves the user experience performance of Web five application pages.
Description
Technical field
The present invention relates to Web Performance Optimization techniques fields, more particularly to are directed to the loaded and optimized method of Web five application pages.
Background technology
Webpage（Webpage）Also referred to as Web document（Web document）, it is generally by a basic token page
It is formed with a variety of web resources or object.Here the basic token page is usually html page, and web resource or object then can be with
It is varied, as various scripts（Such as most typical JavaScript）, data resource（Such as XML, JSON）, stacking sample
Formula table, picture etc. can be Web page constituents, and the numerous Web UI pages of page structure complexity element are then referred to as
The page of rich Web applications.The effect of Web browser is exactly html document of the parsing comprising Various Complex resource and by such resource
It is correctly rendered and is shown on webpage.
It is directed to Web page content loading method at present, is mainly completed in such a way that element increment renders.Lead to below
An example is crossed, to learn about the working method and render process of general browser：
1. user inputs network address（Assuming that being a html pages, and it is to access for the first time）, browser sends out to server
Request, server return to html files；
2. browsers start to be loaded into html codes, find<head>There are one in label<link>The external CSS of label reference
File；
3. browsers send out the request of CSS files again, server returns to this CSS file；
4. browsers continue to be loaded into html<body>Partial code, and CSS files have taken hand, can be with
Start to render the page；
5. browsers find one in code<img>Label refers to a pictures, and request is sent out to server.This
When browser will not have been downloaded until picture, and be to continue with and render subsequent code；
6. servers return to picture file and affect the arrangement of subsequent paragraphs since picture occupies certain area, because
This browser needs turn back to render this partial code again；
7. browsers are found that one includes a line Javascript codes<script>Label runs it quickly；
8. .Javascript scripts perform this sentence, its order browser hides some in code<div>
（style.display=”none”）.At this point, browser has to render this partial code again；
9. is waited until finally</html>Arrival, and once " changing skin " button in interface when the user clicks,
Javascript allows browser to have changed<link>The paths CSS of label；
10. the CSS files that browsers please must look for novelty to server again, render full page again.
Therefrom it is understood that when Web browser navigates to a Web page, it first passes through http protocol and asks rooting
Then the page is directed to and parses and draw operation from the page file that Web service end is fed back into row element, and generate corresponding
Document object model（DOM, Document Object Model）.After the preliminary rendering for completing the page, browser possibility will be after
Supervention send additional request to respond the operations such as user's input, event triggering or the update of Partial Elements, and browser will at this time
Constantly detect DOM element to be updated, and recalculate and draw with the relevant other elements of element to be updated, until DOM
All elements in tree structure are all accurately rendered.This process will be related to flowing back（reflow）, work as browser
It was found that a variation, which has occurred, in some part affects layout, needs to refund and render again, and this process to retract is just named
reflow.Reflux refers to Web browser in order to which the page carried out when rendering full page or Local hydrodynamic unit partial page again is first
Plain positions and dimensions recalculate process.Sometimes reflux operation can only be related to element to be updated itself, or relate only to
The father node and child node of more new element, but be also possible to be related to all elements of full page, so often update a member
Element may need to take some time to recalculate and draw relevant other elements, and behaviour is redrawn until completion full page
Make.
As shown in Figure 1, when Web browser navigates to a webpage, it can send a page to corresponding server
Request is obtained, server can then return to a http response for including the base reference page, and browser is then according to this response page
Face（Such as html page）It carries out parsing and preliminary draw renders（Corresponding document object model dom tree 200 is generated, in this
Drawing basics node 201 in DOMD tree structures, html page successfully renders base node 201 simultaneously to browser according to response first
It is shown as A in Web page）；During parsing, browser may find that need to load some additional resources improving or
Original page is changed, at this time browser then needs to retransmit some additional requests（Such as AJAX request）, then attached according to these
Add the feedback data of request（Such as HTML fragment, XML data or JSON data）It parses and is injected into the existing page（In dom tree
Base node 201 inside draw child node 202, child node 203 again, and child node 202,203 is rendered simultaneously according to feedback data
It is shown as B and C in Web page）.For Web UI, this process would generally cause other elements（Such as adjacent node, father
Node or descendant nodes）Recalculate and draw, such as when loading C, child node 202, base node 201 can be caused simultaneously
Repaint, and this process will devote a tremendous amount of time.In this way, browser often detects an element to be updated,
It is likely to need to recalculate and draw other interdependent nodes, sometimes even needs to redraw all elements section on the page
Point will likely devote a tremendous amount of time in the element size or position constantly repeated calculates in this way, and user will also spend more
Time waits for page loaded, has seriously affected and has applied response performance.
In Web page browser, reflow is almost unavoidable, as long as mouse-over, click etc. behavior cause
The variation of the attributes such as footprints, positioning method, back gauge of certain elements on the page, can all cause inside it, around even
The rendering again of full page.In addition, flowing back in a browser（reflow）It is the operating process of user obstruction, flowed back
Therefore the long performance that will seriously affect user experience of journey efficiently reduces return time and improves Web page loading performance
It is very necessary.
Invention content
The present invention provides a kind of loaded and optimized methods of Web five application pages, and this method is by first hiding DOM node element
（That is base node）, and child node is drawn in the hiding node elements simultaneously, until the DOM node element combinations constitute one
A effective status just carries out the combination of the DOM node element by browser the mode of batch calculating and rendering, can avoid existing
Page elements increment rendering intent in the long problem of return time, effectively reduce page load time, improve Web and answer
User experience performance.
The technical solution used in the present invention is：A kind of Web five application pages rendering optimization method, this method is by first structure
A hiding DOM node element is built, while in hiding at least one child node of node elements internal drawing, until this
The element combinations that the child node of DOM node element and its inside is formed constitute a scheduled effective status, just by browser
Batch calculating and rendering, display to User Page are carried out to the child node of the DOM node element and inside.
The method includes the steps：
Step 1：A hiding node elements are built in a dom tree shape structure, are saved based on the node elements
Point；
Step 2：Continue to add one or more child nodes inside the base node；
Step 3：Judge that the element of all child nodes by the base node and its inside forms, if constitute one and make a reservation for
Effective status otherwise jump to step 2 if so then execute step 4 and continue to add other nodes, the scheduled effective status
Refer to whether the combination of base node and its child node reaches a preset standard；
Step 4：Base node is set to visible state；
Step 5：Web browser batch calculates the base node in visible state and its child node of inside, by each section
A point sexploitation of element is shown to user.
Step 1 includes two steps again：
Step 1.1：A node elements are drawn in the corresponding dom tree shape structures of Web UI；
Step 1.2：The node is hidden by the display properties by changing the node elements, prevents it from by browser
Displaying.
In step 1.2：It includes directly being added in the style attributes of the node elements that node, which is set as hiding method,
“display:None " fields or the class that a CSS is added to the node elements, defined " display in the class:
The pattern of none ".
The drawing basics node and its child node are to carry out html page solution according to a part of current Web UI
The process of analysis.
In step 3, preset standard is that the function of being applied according to current Web, current Web application or similar Web are answered
Historical information, relevant user information, user setting or user preferences and system are provided as reference value to determine.
It sets base node to visible state in step 4, is by changing hiding in the base node Show Styles
Attribute is realized.
The hiding attribute changed in the base node Show Styles includes two methods：First is by base section point sample
" display in formula style:None " fields are removed；Another kind is will be in basic pattern comprising the CSS that hides Styles
Class is removed.
The step（1）It is the trigger action for causing a page rendering, which is a Web site or the page
Request for the first time, or redirecting between the different page or the partially or fully refreshing of current page.
Wherein, preset standard is that the function of being applied according to current Web, current Web application or similar Web are applied
Historical information, relevant user information, user setting or user preferences and system are provided as reference value to determine.
The method of the present invention can substantially reduce reflux when page load, improve the loading performance of Web page, promote user
The performance of experience.
Description of the drawings
Fig. 1 is the schematic diagram that conventional needle renders the increment type reflux that Web five application pages load.
Fig. 2 is the implementing procedure figure of page load performance optimization of the present invention for Web applications.
Fig. 3 is that the schematic diagram of display is hidden or rendered to the batch proposed by the present invention for the load of Web five application pages.
Specific implementation mode
The present invention is a kind of page rendering optimization method for Web applications.This method passes through a hiding base section
Point internal drawing child node constitutes an effective status until the base node and its child node, then the mode that batch rendering is shown
It effectively reduces the calculating time of element position and size, to reduce the generation of reflux, improves page loading velocity, reach optimization
The purpose of the page load performance of Web applications.
As shown in Figure 1, for the flow chart of the method for the present invention, total process includes first drawing and hiding base node, when
When the child node element added makes the base node reach scheduled effective status, which is set to as it can be seen that at this time
Browser again to base node and its added child node element composition resulting structure unifiedly calculated and rendered, to subtract
The time for computing repeatedly and drawing of element is lacked, has reduced reflux, has achieved the purpose that optimize Web five application page loading performance.
As shown in Figure 1, the displaying process flow that a Web UI is directed to user is described, it is specific as follows shown：
S400：The step be cause a page rendering trigger action, can be a Web site or the page for the first time
Request can also be redirecting between the different pages or the partially or fully refreshing of current page.
S401：In two steps, the first step is one DOM of structure in corresponding dom tree shape structure to the primary operational of the step
Node, as basic node（It is equivalent to the upper essential element support container of current Web UI or frame）；Second step is then logical
Cross change the DOM node display properties the base node is set to it is hiding.
Base node is set as hiding, method includes two kinds, the first is the style attributes directly in the node elements
Middle addition " display:None " fields；Second is the class for being added a CSS to the node elements, on condition that the class
Defined in " display:The pattern of none ".
S402：Continue to draw its child node inside base node, which represents another on current Web UI
Effective element or validity event mechanism, to be continuously generated different page constituents.
Child node described here can be diversified forms, such as can be a common DIV display elements, INPUT
Input frame can also be a pictures（The multiple formats such as JPG, PNG, BIF）, one section of video or audio, one section of logical process
Script（Such as JavaScript）, can be with the response data of various formats（Such as JSON, XML）, these can be child node, can
To form a DOM base node.Since base node is set to hiding, therefore its internal all child node is also in hiding shape
State.
S403：The step mainly judges the element combinations currently built（Including just starting the base node of structure and follow-up
The child node constantly added）Whether a scheduled effective status is constituted, if into S404；Otherwise return back to step 402 after
Continue in drawing remaining child node in the base node.
Here effective status is depending on specific application environment, in different occasion effective status phases not to the utmost
Together.Such as in calendar application, only when " date display elements " in calendar and " the event interaction figure with user's intercorrelation
Mark " all structures finish just has reached an effective status at last, because the target of calendar application is exactly to allow user can autonomous control
It is had little significance in fact with option date and time if presenting it to user being constructed without the in the case of of finishing.
Usually, there are many information that the determination of effective status can refer to, function, the current Web applied such as current Web
Using or historical information, relevant user information, user setting or the user preferences of similar Web applications, system setting etc. all
It can be as the predetermined effective status for determining a Rendering operations with reference to value.
S404：Once the element combinations in S403 reach predetermined effective status, then the attribute of base node is set to visible.
It is set to hiding process correspondingly with by base node, it includes two kinds that base node, which is set to visible mode also,：
First is by " the display in base node pattern style:None " fields are removed；Another kind is will be in basic pattern
Including the CSS class to hide Styles are removed.
It should be noted that base node, which is set to, to be seen below, internal all child nodes will also become visible state.
S405：Web browser batch calculates the base node in visible state and its child node of inside, is rendered
It is shown to user.So just complete it is primary effective render, and reduce return time to a certain extent, alleviate the page and add
Carry delay situation.
Fig. 3 is that the schematic diagram of display is hidden or rendered to the batch proposed by the present invention for the load of Web five application pages.
When Web browser navigates to a webpage, it can send a page access request, clothes to corresponding server
Business device can then return to a http response for including the base reference page, and browser is then according to this response page（Such as HTML page
Face）It is parsed, generates corresponding document object model dom tree 200, hiding base node is drawn in dom tree shape structure
201, which is invisible, then continues to draw child node 202 inside the base node 201, in this process
Middle browser constantly judges whether the element combinations of the base node 201 and its internal child node 202 constitute and preset have
Effect state, as shown in figure 3, the element combinations of the child node 202 internal with it of base node 201 not yet constitute and make a reservation for effective shape
State, therefore continue at and draw child node 203 inside base node 201 again, which is also hidden state；At this point, browsing
Device judges that the element combinations of the base node 201 child node 202,203 internal with it have constituted scheduled effective shape
State, then browser the base node 201 is set to as it can be seen that simultaneously its internal child node 202,203 be also as it can be seen that finally by
Browser batch calculates the base node 201 in visible state and its child node 202,203 of inside, by aforementioned nodes element
Sexploitation of combination is shown as A, B and C, to be presented to user.
It can be seen that compared to the mode that existing increment shown in FIG. 1 renders, the method for the present invention can substantially reduce the page
Reflux course when load improves the loading performance of Web page, promotes the performance of user experience.
The foregoing is only a preferred embodiment of the present invention, when cannot limit the scope of the present invention with this；Therefore
It is all according to simple equivalent changes and modifications made by claims of the present invention and description, all should still belong to patent of the present invention
In the range of covering.
Claims (8)
1. a kind of Web five application pages render optimization method, it is characterised in that：This method is by first building a hiding DOM
Node elements, while in hiding at least one child node of node elements internal drawing, until the DOM node element and its interior
Element combinations that the child node in portion is formed constitute a scheduled effective status, just by browser to the DOM node element and
Internal child node carries out batch calculating and rendering, display to User Page；The method specifically includes step：
Step 1：A hiding node elements are built in a dom tree shape structure, the node elements are as basic node；
Step 2：Continue to add one or more child nodes inside the base node；
Step 3：Judge that the element of all child nodes by the base node and its inside forms, if composition one is scheduled to be had
Otherwise effect state jumps to step 2 and continues to add other nodes, the scheduled effective status refers to if so then execute step 4
Whether the combination of base node and its child node reaches a preset standard；
Step 4：Base node is set to visible state；
Step 5：Web browser batch calculates the base node in visible state and its child node of inside, by each node member
A plain sexploitation is shown to user.
2. a kind of Web five application pages as described in claim 1 render optimization method, which is characterized in that step 1 includes two again
Step：
Step 1.1：A node elements are drawn in the corresponding dom tree shape structures of Web UI；
Step 1.2：The node is hidden by the display properties by changing the node elements, prevents it from by browser exhibition
Show.
3. a kind of Web five application pages as claimed in claim 2 render optimization method, which is characterized in that in step 1.2：It will
It includes the addition " display directly in the style attributes of the node elements that node, which is set as hiding method,:None " fields are given
The node elements add the class of a CSS, defined " display in the class:The pattern of none ".
4. a kind of Web five application pages as described in claim 1 render optimization method, which is characterized in that the drawing basics
Node and its child node are the processes that html page parsing is carried out according to a part of current Web UI.
5. a kind of Web five application pages as described in claim 1 render optimization method, which is characterized in that in step 3, set in advance
Fixed standard is the function of being applied according to current Web, the historical information that current Web is applied, similar Web is applied, relevant user
At least one conduct in information, user setting, user preferences and system setting is determined with reference to value.
6. a kind of Web five application pages as described in claim 1 render optimization method, which is characterized in that by base section in step 4
Point is set as visible state, is realized by changing the hiding attribute in the base node Show Styles.
7. a kind of Web five application pages as claimed in claim 6 render optimization method, which is characterized in that described modification basis
Hiding attribute in node Show Styles includes two methods：First is by " the display in base node pattern style:
None " fields are removed；Another kind is will to be removed comprising the CSS class to hide Styles in basic pattern.
8. a kind of Web five application pages render optimization method as described in claim 1, which is characterized in that the step（1）It is to cause
The trigger action of page rendering, the trigger action are the requests for the first time of a Web site or the page, or the different pages
Between redirect or the partially or fully refreshing of current page.
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| CN107229665B (en) * | 2016-03-25 | 2021-04-13 | 阿里巴巴集团控股有限公司 | Page skipping method and device |
| CN107025111A (en) * | 2017-03-17 | 2017-08-08 | 烽火通信科技股份有限公司 | The method and system that a kind of browser target pages entire screen switch is shown |
| CN107665134A (en) * | 2017-09-29 | 2018-02-06 | 北京金山安全软件有限公司 | Page component loading method, device, medium and terminal equipment |
| CN109299158A (en) * | 2018-10-12 | 2019-02-01 | 成都北科维拓科技有限公司 | A kind of data visualization method and system |
| CN111258877B (en) * | 2018-11-30 | 2023-05-02 | 阿里巴巴集团控股有限公司 | Method and device for detecting visible time of first screen page and electronic equipment |
| CN109753333B (en) * | 2019-01-11 | 2022-07-08 | 广州视源电子科技股份有限公司 | Interface layout method, device, equipment and medium |
| CN110442815B (en) * | 2019-06-24 | 2022-04-01 | 北京奇艺世纪科技有限公司 | Page generation method, system, device and computer readable storage medium |
| CN110689600A (en) * | 2019-09-16 | 2020-01-14 | 贝壳技术有限公司 | Rendering method and device of tree component, readable storage medium and electronic equipment |
| CN112540745A (en) * | 2019-09-20 | 2021-03-23 | 北京国双科技有限公司 | Component rendering method and device |
| CN111061633B (en) * | 2019-12-05 | 2024-04-30 | 北京达佳互联信息技术有限公司 | Webpage first screen time detection method, device, terminal and medium |
| CN111143734A (en) * | 2019-12-27 | 2020-05-12 | 苏宁云计算有限公司 | Method and system for adding effect elements to page |
| CN111353113B (en) * | 2020-02-28 | 2022-06-03 | 江苏方天电力技术有限公司 | Visual rendering method suitable for high-frequency state data of unmanned aerial vehicle |
| CN111651700B (en) * | 2020-06-05 | 2024-01-09 | 腾讯科技（深圳）有限公司 | Message display method and device, electronic equipment and storage medium |
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