[英]Reach element in an object inside an array which is an element in an object inside an array
我試圖到達數組內 object 中的一個元素,該數組是數組內 object 中的一個元素。 看下面的代碼。 thirdElementInObject 具有可變長度。 我的計划是用 mainArray 中的每個 object 制作列表元素。 我還沒有用 thirdElementInObject 數組中的元素實現它。 有誰知道我該怎么做?
mainArray = [
{firstElementInObject: xyz,
secondElementInObject: abc,
thirdElementInObject: [
{name: zzz,
age: aaa,
},
{name: cde,
age: 123,
},
],
},
{firstElementInObject: xyz,
secondElementInObject: abc,
thirdElementInObject: [
{name: xxx,
age: yyy,
},
{name: abc,
age: def,
},
{name: abc,
age: def,
}
],
}
]
const parentElementDash = document.querySelector('.mainArrayUl');
const updateHTML = function () {
if (mainArray.length > 0) {
let result = mainArray.map(element => {
return `
<li>
<p>${element.firstElementInObject}</p>
<p>${element.secondElementInObject}</p>
/* Here I want to write the name in the
thirdElementInObject. */
</li>`
});
parentElementDash.innerHTML = result.join('');
}
}
updateHTML();
.map()
將所有名稱作為數組獲取。.join()
將數組轉換為字符串並將其插入到 HTML 中。嘗試這個
var mainArray = [ { firstElementInObject: 'xyz', secondElementInObject: 'abc', thirdElementInObject: [ {name: 'zzz', age: 'aaa',}, {name: 'cde', age: 123,}, ], }, { firstElementInObject: 'xyz', secondElementInObject: 'abc', thirdElementInObject: [ {name: 'xxx', age: 'yyy',}, {name: 'abc', age: 'def',}, {name: 'abc', age: 'def',} ], } ] const parentElementDash = document.querySelector('.mainArrayUl'); const updateHTML = function () { if (mainArray.length > 0) { let result = mainArray.map(element => { return ` <li> <p>${element.firstElementInObject}</p> <p>${element.secondElementInObject}</p> <p>${element.thirdElementInObject.map(({name}) => name).join(', ')}</p> </li>` }); parentElementDash.innerHTML = result.join(''); } } updateHTML();
<ul class="mainArrayUl"></ul>
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