JS实现在文本指定位置插入内容
其他
2019-02-25 02:48:33
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- function insertAtCursor(myField, myValue) {
-
-
- if (document.selection) {
- myField.focus();
- sel = document.selection.createRange();
- sel.text = myValue;
- sel.select();
- }
-
-
- else if (myField.selectionStart || myField.selectionStart == '0') {
- var startPos = myField.selectionStart;
- var endPos = myField.selectionEnd;
-
-
- var restoreTop = myField.scrollTop;
- myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);
-
- if (restoreTop > 0) {
- myField.scrollTop = restoreTop;
- }
-
- myField.focus();
- myField.selectionStart = startPos + myValue.length;
- myField.selectionEnd = startPos + myValue.length;
- } else {
- myField.value += myValue;
- myField.focus();
- }
- }
- <textarea id="textarea" style="width: 386px; height: 260px">
- </textarea>
- <input type="text" id="text" />
- <input type="button" value="插入" onclick="insertAtCursor(document.getElementById('textarea'),document.getElementById('text').value)" />
转载自blog.csdn.net/qq_20960159/article/details/78820023