用JS提取文本中的指定字符

Question

txt="<div class="question branchGroup0 questionPos1" id="questionId587271" data-id="587271" data-pos="1" style="outline: 1px solid blue;"> <style> .survey-video, .video-player-iframe { min-height: 200px; border: none; max-width: 640px; max-height: 350px; margin: 0; padding: 0; } .survey-media { margin: 10px auto; } </style> <div class="survey-media maxwidth500">"

想通过JS把txt里面的587271给提取出来，格式多行写成一行的，谢谢

Answer 1

正则直接挑出来：

txt.match(/data-id=['"]([0-9]*)/)[1]

Answer 2

function getNumber(txt){
    let tArr = txt.match(/(Id\d+|id="\d+)/g);
    let result = [];
    tArr.forEach(function(item){
        let arr = item.match(/\d+/);
        result.push(arr[0]);
    });
    return result;
}