<form action="">
<textarea name="textBox" id="" cols="30" rows="10"></textarea>
</form>
<script>
var textBox = document.forms[0].elements['textBox'];
function getSelectedText(textBox) {
/*selectionStart selectionEnd 是HTML5新增方法*/
if (typeof textBox.selectionStart === 'number') {
return textBox.value.substring(textBox.selectionStart, textBox.selectionEnd);
}
/*不支持HTML5的版本*/
else if (window.getSelection) {
return window.getSelection().toString();
}
/*兼容ie*/
else if (document.selection) {
return document.selection.createRange().text;
}
}
textBox.addEventListener('select', function () {
console.log(getSelectedText(this));
}, false);
/*选择指定的文本*/
function SelectText(textBox, startIndex, endIndex) {
if (textBox.setSelectionRange) {
textBox.setSelectionRange(startIndex, endIndex);
}
/*兼容ie，创建selection对象*/
else if (textBox.createTextRange) {
var range = textBox.createTextRange();
range.collapse(true);
range.moveStart('character', startIndex);
range.moveEnd('character', endIndex - startIndex);
range.select();
}
textBox.focus();
}
https://www.cnblogs.com/ArthurPatten/p/3317263.html
