var matchwords;function notifyTextLength() {var inputNum = document.getElementById("txtTitle").value.replace(/[^\x00-\xff]/g, "**").length; //得到输入的字节数if (inputNum <= 200) {matchWords = document.getElementById("txtTitle").value.length;document.getElementById("inputedWord").innerHTML = inputNum + "字节," + matchWords + "字符";document.getElementById("inputtingWord").innerHTML = (200 - inputNum) + "字母,"+(Math.round(((200-inputNum)/2)-0.5))+"汉字";}if (inputNum > 200) {document.getElementById("txtTitle").value = document.getElementById("txtTitle").value.substring(0, matchWords);php版微信js-sdk支付接口类php版微信js-sdk支付接口类下载//如果超过200字节，就截取到200字节}}当前已经输入 还可以输入
JS 判断字串字节数，并截取长度
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