我正在尝试使用动态名称访问对象的属性。这可能吗？
2
756const something = { bar: "Foobar!" };
const foo = 'bar';
something.foo; // The idea is to access something.bar, getting "Foobar!"
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这是我的解决方案：
function resolve(path, obj) { return path.split('.').reduce(function(prev, curr) { return prev ? prev[curr] : null }, obj || self) }使用示例：
resolve("document.body.style.width") // or resolve("style.width", document.body) // or even use array indexes // (someObject has been defined in the question) resolve("part.0.size", someObject) // returns null when intermediate properties are not defined: resolve('properties.that.do.not.exist', {hello:'world'})有两种访问属性的方法 对象：
something.barsomething['bar']括号内的值可以是任意表达式。因此，如果属性名称存储在变量中，则必须使用括号表示法：
var something = { bar: 'foo' }; var foo = 'bar'; // both x = something[foo] and something[foo] = x work as expected console.log(something[foo]); console.log(something.bar)