40 lines
841 B
JavaScript
40 lines
841 B
JavaScript
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// jquery.observe_field.js
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(function( $ ){
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jQuery.fn.observe_field = function(frequency, callback) {
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frequency = frequency * 1000; // translate to milliseconds
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return this.each(function(){
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var $this = $(this);
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var prev = $this.val();
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var check = function() {
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var val = $this.val();
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if(prev != val){
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prev = val;
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$this.map(callback); // invokes the callback on $this
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}
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};
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var reset = function() {
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if(ti){
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clearInterval(ti);
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ti = setInterval(check, frequency);
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}
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};
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check();
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var ti = setInterval(check, frequency); // invoke check periodically
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// reset counter after user interaction
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$this.bind('keyup click mousemove', reset); //mousemove is for selects
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});
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};
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})( jQuery );
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