效果图：
’
<script type="text/javascript">
var str1 = 'For months, city has been engulfed in widespread violence and mobs attacksp the ';
var result1 = reg_replace(str1, "the");
console.log(result1);
function reg_replace(str, keyword) {
var reg = new RegExp(keyword, "gi");
var result = [];
var match_result = str.split(reg);
if (match_result.length > 1) {
for (var i = 0, length = match_result.length; i < length; i++) {
if (i) {
result.push(keyword);
}
result.push(match_result[i]);
}
} else {
match_result.unshift('');
//push('');
match_result.push('');
result = match_result;
}
return result;
console.log(result)
}
</script>
小程序中：