我正在尝试将所选字符串包装在两个字符之间例如:选择“测试”并单击“更改”按钮会将所选文本更改为“ atestb”问题是,我能够替换选定的文本,但是window.getSelection()。toString()变为空。这是即时通讯使用的功能
replaceSelectedText(startTag, endTag) {
let sel, range;
console.log(window.getSelection().toString())
if (window.getSelection) {
sel = window.getSelection();
if (sel.rangeCount) {
range = sel.getRangeAt(0);
range.deleteContents();
const selectedContent = sel.toString();
console.log("Selected Content ")
console.log(selectedContent)
let replaceDiv = startTag + selectedContent;
replaceDiv=endTag ? replaceDiv + endTag : replaceDiv;
range.insertNode(document.createTextNode(replaceDiv));
}
} else if ((document as any).selection && (document as any).selection.createRange) {
range = (document as any).selection.createRange();
range.text = startTag;
}
}
链接到Stackblitzhttps://stackblitz.com/edit/angular-idyhj5?file=src%2Fapp%2Fapp.component.ts
您要在检索值之前删除它。
range.deleteContents();
const selectedContent = sel.toString();
如果您翻转这两行并在删除前存储内容,它将按预期工作。