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On the solution to the event problem of dynamic binding after innerHTML loss _javascript tips

Source: Internet
Author: User
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Use innerHTML to remove a piece of content and then innerhtml back, then the original dynamically bound event will be lost, such as:
Html:
Copy Code code as follows:

<body><div id= ' D1 ' > click </div></body>

Script
Copy Code code as follows:

document.getElementById (' D1 '). Onclick=function () {alert (1)};
var html=document.body.innerhtml;
document.body.innerhtml=html;

After this code is executed, clicking D1 is no response.
Workaround :
The onclick binding to the parent element, using the bubble principle, to determine whether the current element is D1, if the D1 is executed
Copy Code code as follows:

Document.body.onclick=function (e) {
var e=e| | Event
var current=e.target| | E.srcelement
if (current.id== ' D1 ') {alert (1)}
}

This is also a compromise approach that will certainly affect efficiency.

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