21 lines
681 B
JavaScript
21 lines
681 B
JavaScript
$.fn.frequencyInput = function() {
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this.each(function(){
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var $group = $(this);
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var currentExponent = 0;
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$input = $group.find('input');
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var setExponent = function() {
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var newExponent = parseInt($exponent.val());
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var delta = currentExponent - newExponent;
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$input.val(parseFloat($input.val()) * 10 ** delta);
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currentExponent = newExponent;
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};
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$exponent = $group.find('select.frequency-exponent');
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$exponent.on('change', setExponent);
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// calculate initial exponent
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$exponent.val(Math.floor(Math.log10($input.val()) / 3) * 3);
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setExponent();
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})
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}; |