我正在使用此答案中显示的技术将网页的选择扩展到单词边界:
function snapSelectionToWord() {
var sel;
// Check for existence of window.getSelection() and that it has a
// modify() method. IE 9 has both selection APIs but no modify() method.
if (window.getSelection && (sel = window.getSelection()).modify) {
sel = window.getSelection();
if (!sel.isCollapsed) {
// Detect if selection is backwards
var range = document.createRange();
range.setStart(sel.anchorNode, sel.anchorOffset);
range.setEnd(sel.focusNode, sel.focusOffset);
var backwards = range.collapsed;
range.detach();
// modify() works on the focus of the selection
var endNode = sel.focusNode, endOffset = sel.focusOffset; …Run Code Online (Sandbox Code Playgroud)