{在正则中有特殊意义,如果想匹配{需要进行转义
<script>
var mst1 = "111111";
var hello = "\\{1\\}";
var ttt = new RegExp(hello,"g")
ms_html = "ff{{peng}}ff{1}f";
ms_html = ms_html.replace(ttt,mst1);
alert(ms_html);
</script>
<script>
var mst1 = "111111";
var hello = "\\{1\\}";
var ttt = new RegExp(hello,"g")
ms_html = "ff{{peng}}ff{1}f";
ms_html = ms_html.replace(ttt,mst1);
alert(ms_html);
</script>
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