How to implement progress bar in html

In HTML, you can use the progress tag to implement a progress bar. This tag can define the progress of a running task (process). Use the syntax "".

The operating environment of this tutorial: Windows 7 system, HTML5 version, Dell G3 computer.

tag defines the progress (process) of a running task.

下载进度：
<progress value="22" max="100">
</progress>

Rendering:

Description: The tag can be used with JavaScript to dynamically display the progress of the task.

<progress id=&#39;progress1&#39; value="0" max="100">
</progress>
<button onclick="start_run(100)">下载</button>
<script>
function start_run(n)
{
    if(n==0){alert("下载完成")}
    var progress1=document.getElementById("progress1")
    n=n-1
    cur_task=100-n
    progress1.value=cur_task
    setTimeout("start_run("+n+")",100)
    
}
</script>

Rendering:

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