javascript - Trigger action on Label change -

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i'm doing website plugin appending block of code on existing web page, monitors content change of web element on existing page , trigger further actions on change.

as plugin don't want modify code block of original page, want monitored element , register kind of "change event" on element code block. example

<html> ... <body> ... <label id="idlable">some text</label> ...  <!-- here begin code block --> <script> var label = document.getelementbyid("idlabel") label.addonchange(function (oldvalue, newvalue) {     //do }); </script> <!-- here end code block -->  </body> </html>

i googled long time, didn't find solution. there possible that?

my thanks, hai

there no native function/option in js. can monitor changes using setinterval function here sample code :

var oldtext=document.getelementbyid("idlabel").data; var tmr = window.setinterval(function(){ if(document.getelementbyid("idlabel").data != oldtext ) {      //your code goes here       window.clearinterval(tmr); } },1000);

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