在網上看了很多用js在游標處插入文字的代碼,很多都沒有用,互抄而已,浪費時間。最近用到一個新方法,可以到達這個需求。IE支援document.selection,Firefox,Chrome,Safari以及Opera都有selectionStart和selectionEnd屬性。
效果示範
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代碼如下:
function insertText(obj,str) { if (document.selection) { var sel = document.selection.createRange(); sel.text = str; } else if (typeof obj.selectionStart === 'number' && typeof obj.selectionEnd === 'number') { var startPos = obj.selectionStart, endPos = obj.selectionEnd, cursorPos = startPos, tmpStr = obj.value; obj.value = tmpStr.substring(0, startPos) + str + tmpStr.substring(endPos, tmpStr.length); cursorPos += str.length; obj.selectionStart = obj.selectionEnd = cursorPos; } else { obj.value += str; }}function moveEnd(obj){ obj.focus(); var len = obj.value.length; if (document.selection) { var sel = obj.createTextRange(); sel.moveStart('character',len); sel.collapse(); sel.select(); } else if (typeof obj.selectionStart == 'number' && typeof obj.selectionEnd == 'number') { obj.selectionStart = obj.selectionEnd = len; }}