我试图让我的 javascript 脚本更加动态,但我不太习惯使用它,所以我需要帮助弄清楚是否可以向属性名称添加计数器?
所以我想要这段代码:
var title1 = document.getElementsByClassName('requestRightsTitle1')[0].value;
var email1 = document.getElementsByClassName('requestRightsEmail1')[0].value;
var title2 = document.getElementsByClassName('requestRightsTitle2')[0].value;
var email2 = document.getElementsByClassName('requestRightsEmail2')[0].value;
var title3 = document.getElementsByClassName('requestRightsTitle3')[0].value;
var email3 = document.getElementsByClassName('requestRightsEmail3')[0].value;
var title4 = document.getElementsByClassName('requestRightsTitle4')[0].value;
var email4 = document.getElementsByClassName('requestRightsEmail4')[0].value;
做类似的事情:
var inputFields = [];
for (i = 1; i <= 5; i++) {
inputFields.push({
title: document.getElementsByClassName('requestRightsTitle'+i)[0].value,
email: document.getElementsByClassName('requestRightsEmail'+i)[0].value
})
}
但我需要这个标题和电子邮件为标题1、电子邮件1、标题2、电子邮件2...
我尝试过:
for (i = 1; i <= 5; i++) {
inputFields.push({
'title'+i: document.getElementsByClassName('requestRightsTitle'+i)[0].value,
'email'+i: document.getElementsByClassName('requestRightsEmail'+i)[0].value
})
}
类似的事情,但没有成功。如果有办法实现这一点,请分享您的解决方案。提前致谢。
最佳答案
无需在属性名称上添加数字后缀。您将属性放在不同的对象中,因此只需使用 title
和 email
,这样您的对象就有一组一致的属性名称:
for (i = 1; i <= 5; i++) {
inputFields.push({
title: document.getElementsByClassName('requestRightsTitle'+i)[0].value,
email: document.getElementsByClassName('requestRightsEmail'+i)[0].value
});
}
实例:
var i;
var inputFields = [];
for (i = 1; i <= 3; i++) {
inputFields.push({
title: document.getElementsByClassName('requestRightsTitle'+i)[0].value,
email: document.getElementsByClassName('requestRightsEmail'+i)[0].value
});
}
console.log(inputFields);
.as-console-wrapper {
max-height: 100% !important;
}
<input class="requestRightsTitle1" value="title 1">
<input class="requestRightsEmail1" value="email 1">
<br>
<input class="requestRightsTitle2" value="title 2">
<input class="requestRightsEmail2" value="email 2">
<br>
<input class="requestRightsTitle3" value="title 3">
<input class="requestRightsEmail3" value="email 3">
但如果你确实有理由这样做:
使用 ES2015+ 语法,您可以使用计算属性名称来实现:
for (i = 1; i <= 5; i++) {
inputFields.push({
["title" + i]: document.getElementsByClassName('requestRightsTitle'+i)[0].value,
["email" + i]: document.getElementsByClassName('requestRightsEmail'+i)[0].value
});
}
在 ES5 之前,您必须先创建对象,然后添加属性:
for (i = 1; i <= 5; i++) {
var obj = {};
obj["title" + i] = document.getElementsByClassName('requestRightsTitle'+i)[0].value;
obj["email" + i] = document.getElementsByClassName('requestRightsEmail'+i)[0].value;
inputFields.push(obj);
}
关于javascript - 在 javascript 中向属性名称添加计数器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/50908669/