65 lines
1.5 KiB
JavaScript
65 lines
1.5 KiB
JavaScript
/**
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* 获取当前光标位置 返回表示位置的索引（number）以0开头
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* @param ctrl
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* @returns {number}
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*/
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export function getCursorPosition(element) {
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var CaretPos = 0;
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if (document.selection) {//支持IE
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element.focus();
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var Sel = document.selection.createRange();
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Sel.moveStart('character', -element.value.length);
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CaretPos = Sel.text.length;
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}
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else if (element.selectionStart || element.selectionStart == '0')//支持firefox
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CaretPos = element.selectionStart;
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return (CaretPos);
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}
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export function insertAtCursor(myField, myValue) {
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//IE 浏览器
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if (document.selection) {
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myField.focus();
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sel = document.selection.createRange();
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sel.text = myValue;
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sel.select();
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}
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//FireFox、Chrome等
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else if (myField.selectionStart || myField.selectionStart == '0') {
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var startPos = myField.selectionStart;
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var endPos = myField.selectionEnd;
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// 保存滚动条
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var restoreTop = myField.scrollTop;
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myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);
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if (restoreTop > 0) {
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myField.scrollTop = restoreTop;
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}
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myField.focus();
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myField.selectionStart = startPos + myValue.length;
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myField.selectionEnd = startPos + myValue.length;
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} else {
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myField.value += myValue;
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myField.focus();
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}
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} |