去除字符串指定位置字符

<script type="text/javascript">
     var str = ‘hello_100x100‘
    console.log(str)    打印出hello_100x100
    var str2 = str.replace(‘_100x100‘, ‘‘)
    console.log(str2)   打印出hello
</script>

<script type="text/javascript">
    var array = [ ‘wo_100x100‘, ‘nc_100x100‘, ‘woc_100x100‘, ]
    var arrlist = array.forEach(item => {
        // document.write(item + ‘<br>‘)
        document.write(item.replace(‘_100x100‘, ‘‘) + ‘<br>‘)    
　　　　　打印出 
　　　　　wo
　　　　　nc
        woc
    })
</script>