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HarmonyOS
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>求出数组中所有数字的和</title>
<style>
body {
color: #999;
font: 12px/1.5 Tahoma;
}
#outer {
width: 500px;
margin: 0 auto;
}
#outer input {
padding: 3px;
border: 1px solid #ccc;
font-family: inherit;
width: 220px;
margin-right: 10px;
}
.sum {
font-size: 30px;
color: red;
}
</style>
<script>
window.onload = function () {
var oBtn = document.getElementsByTagName("button")[0];
var oInput = document.getElementsByTagName("input")[0]
var oStrong = document.getElementsByTagName("strong")[0];
oInput.onkeyup = function () {
this.value = this.value.replace(/[^(\d)|(,)]/, "")
}
oBtn.onclick = function () {
var sum = 0;
var oInput = document.getElementsByTagName("input")[0].value.split(",");
for (var i in oInput) {
sum += parseInt(oInput[i])
}
oStrong.innerHTML = sum
}
}
</script>
</head>
<body>
<div id="outer">
<label><input type="text" value="1,2,3,4,5,6,7,8,9,10,11,12,13,14,15" /><span>输入数字求和，数字之间用半角","号分隔</span></label>
<p><button>求和</button></p>
<strong class="sum"></strong>
</div>
</body>
</html>this.value = this.value.replace(/1/, "")
实在看不懂这一句，求大神指点。
- (d)|(,) ↩
把不是数字或逗号的字符全部替换为空字符串。