我四处搜寻，找不到任何可以帮助我的东西。我希望得到一些帮助。
JavaScript 代码搜索文本正文并找到一个短语，然后它应该在找到它后抓取整个文本。
在单行字符串上效果很好，但在多行上效果不佳:(
理想情况下，我可以在同一个文本框中列出所有颜色，并用逗号分隔。
就像给我“颜色受影响”之后的所有内容，直到我们到达空行。 这可能吗？
https://jsfiddle.net/fenster89411/knrzpvta/3/工作示例
function extractInfo() {
var text = document.getElementById('textarea').value
text = text.split('\n')
for (let i = 0; i < text.length; i += 1) {
if (text[i].includes('Scheduled Maintenance')) {
var approverName = text[i].replace('Scheduled', '').trim();
document.getElementById('approvername').value = approverName;
}
if (text[i].includes('Maintenance ID')) {
var approverEmail = text[i].replace(/.*Maintenance ID\D*(\d*).*/, '$1').trim();
document.getElementById('approveremail').value = approverEmail;
}
}
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Information Extraction</title>
</head>
<body>
<textarea id="textarea" rows="20" cols="50">
Scheduled Maintenance 44445555666 - Multiple COLOURS Affected
Maintenance ID 444555666
Colours affected
Yellow
Blue
Black
red
purple
</textarea>
<button onclick="extractInfo()">Extract Information</button>
<!-- Display extracted information -->
<div>
<label for="approvername">Scheduled Maintenance Name:</label>
<input type="text" id="approvername" readonly>
</div>
<div>
<label for="approveremail">Maintenance ID Email:</label>
<input type="text" id="approveremail" readonly>
</div>
<script src="script.js"></script>
</body>
</html>几乎涵盖任何可能的有效场景的正则表达式可能类似于以下内容......
const regXColors = /Colours\s+affected(?:\n+(?:(?:(.*?)(?:\n{2,}|\n$))|(.*)))/gs;
...并且其模式在其游乐场页面得到解释。
RegExp.prototype.execfunction getAllAffectedColors(value) {
const regXColors =
// see ... [https://regex101.com/r/dKw9gG/1]
/Colours\s+affected(?:\n+(?:(?:(.*?)(?:\n{2,}|\n$))|(.*)))/gs;
const regXResult = regXColors.exec(value) ?? [];
const colorValue = (regXResult[1] || regXResult[2]) ?? null;
return (colorValue === null) ? [] : colorValue.split(/\n/);
}
function logAllAffectedColors() {
const textValue = document.querySelector('#textarea').value;
const colorList = getAllAffectedColors(textValue);
console.clear();
console.log({ colorList, colorString: colorList.join(', ') });
}
document
.querySelector('button')
.addEventListener('click', logAllAffectedColors);body { margin: 0; }
button { display: block; }
textarea { width: 40%; }
.as-console-wrapper { left: auto!important; width: 57%; min-height: 100%; }<textarea id="textarea" rows="11" cols="30">
Maintenance ID 444555666
Colours affected
Yellow
Blue
Black
red
purple
</textarea>
<button>log all affected colors</button>