我花了几个小时但无法解决我的问题,
<script>
function myFunction() {
var str = document.getElementById("text").value;
var pattern = document.getElementById("inputpattern").value;
var replacetext = document.getElementById("inputreplacetext").value;
var n = str.replace(pattern,replacetext);
document.getElementById("demo").innerHTML = n;
}
</script>
我需要用html输入字段设置str.replace(pattern,replacetext);
,为什么它不起作用?