generated from zhaoxingchang/i-tax-management-front-lxzy
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39 lines
1.4 KiB
39 lines
1.4 KiB
(function () {
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const isEmpty = function (value) {
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return value.replace(/\s/, '').length > 0;
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};
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const getStyle = function (element, property) {
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if (!!document.defaultView.getComputedStyle) {
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return document.defaultView.getComputedStyle(element, null)[property];
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} else {
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const currentStyle = element.currentStyle;
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return currentStyle[property];
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}
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};
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let addEven = function (ele, type, callback) {
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if (document.addEventListener) {
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addEven = function (ele, type, callback) {
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ele.addEventListener(type, callback, false);
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};
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} else {
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addEven = function (ele, type, callback) {
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ele.attachEvent('on' + type, callback);
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};
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}
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addEven(ele, type, callback);
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};
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this.autoTextArea = function (dom) {
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if (!(dom && dom.nodeType === 1 && dom.nodeName === 'TEXTAREA')) return;
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const diff = parseInt(getStyle(dom, "paddingTop") || 0) + parseInt(getStyle(dom, "paddingBottom") || 0);
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if (isEmpty(dom.value)) {
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dom.style.height = dom.scrollHeight - diff + "px";
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}
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addEven(dom,"input", function (e) {
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const event = e || window.event;
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const target = event.target || event.srcElement;
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target.style.height = "0";
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target.style.height = target.scrollHeight - diff + "px";
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});
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};
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})();
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