javascript 如何在javascript和jquery中先加载一些东西

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时间:2020-10-26 20:10:30  来源:igfitidea点击:

How to make something load first before another in javascript and jquery

javascriptjquery

提问by dramasea

I have a div with text in it and a background image. When I load the page the text always appear 1st(assume i have low speed internet connection). How can i make the background image load before text? Can You please give me solution in both jquery and javascript

我有一个带有文本和背景图像的 div。当我加载页面时,文本总是出现在第 1 位(假设我的互联网连接速度较低)。如何在文本之前加载背景图像?你能在 jquery 和 javascript 中给我解决方案吗

回答by Briguy37

Add the text in the onload event handlerfor the image.

在图像的onload 事件处理程序中添加文本。

Note: If you want to keep using a divtag with a background image rather than an imgtag, you'll have to add the text during the window.onloadevent (see this answerfor the details).

注意:如果您想继续使用div带有背景图像而不是img标签的标签,则必须在window.onload事件期间添加文本(有关详细信息,请参阅此答案)。

回答by Nenotlep

Assuming your div looks like this:

假设您的 div 如下所示:

<div id="Derp" style="CSS-for-background-image-here">Magical ponies!</div>

I would try removing the text completely and then add this kind of jquery call:

我会尝试完全删除文本,然后添加这种 jquery 调用:

<script>
    $(document).ready(function() {
        $('#Derp').load(function() {
            $('#Derp').text("Magical ponies!");
        });
    });
</script>

The $('#Derp').load(...)is the key here. See the docs for load().It has an example of exactly what you need.

$('#Derp').load(...)是这里的关键。请参阅 load() 的文档。它有一个完全符合您需要的示例。

回答by user1026361

you could populate the content onload.

您可以在加载时填充内容。

Start with this:

从这个开始:

<div id="content"></div>

Then, in jquery, do this:

然后,在 jquery 中,执行以下操作:

 $(document).ready(function() {
    mybg= new Image(); 
    mybg.onload=function(){
      $('#content').html('YOURTEXTHERE');
    }
    mybg.src = "PATH/TO/IMG";
    });

回答by Jai

your simple answer is .loadyou can do when your window gets loaded fully and then text appears:

您的简单答案是.load当您的窗口完全加载然后出现文本时您可以执行以下操作:

$(function(){
    $(window).load(function() {
        $('p').fadeIn(800);
    });?
});

what this is doing is fading in the p tag with textwhen whole window gets loaded.

这是在做的事情是fading in the p tag with text完整的window gets loaded

you can find a demo here: http://jsfiddle.net/a5P8b/

你可以在这里找到一个演示:http: //jsfiddle.net/a5P8b/