富文本中 移动光标到末尾

//把光标移到末尾

msgTextLastPos( obj) {

// 解决浏览器的兼容问题，做如下条件判断

if ( window. getSelection) {

obj. focus();

let range = window. getSelection();

range. selectAllChildren( obj);

range. collapseToEnd(); //光标移至最后

}

else if ( document. selection) {

let range = document. selection. createRange();

range. moveToElementText( obj);

range. collapse( false); //光标移至最后

range. select();

}

}