Javascript ReactJS:使用spread元素更新状态
我收到一个语法错误,我不知道为什么: 当前状态如下所示:Javascript ReactJS:使用spread元素更新状态,javascript,reactjs,Javascript,Reactjs,我收到一个语法错误,我不知道为什么: 当前状态如下所示: people: [{ id: 1, firstName: 'Eric', lastName: 'Andrews', }, { id: 2, firstName: 'Rick', lastName: 'Handsome', }, { id: 3, firstName: 'Yoni', lastName: 'Andrews', }], addNewFriend() {
people: [{
id: 1,
firstName: 'Eric',
lastName: 'Andrews',
}, {
id: 2,
firstName: 'Rick',
lastName: 'Handsome',
}, {
id: 3,
firstName: 'Yoni',
lastName: 'Andrews',
}],
addNewFriend() {
this.setState({
people: {
[...this.state.people, {
id: this.state.idIncrementor + 1,
firstName: this.state.newPerson['newFirstName'],
lastName: this.state.newPerson['newLastName'],
}]
},
newPerson: ''
})
}
Syntax error: Unexpected token (156:26)
154 | this.setState(
155 | {
> 156 | people: {[...this.state.people,
| ^
157 | {
158 | id: this.state.idIncrementor +1,
159 | firstName: this.state.newPerson['newFirstName'],
我想合并this.state.people
和一本新词典people
是当前的词典列表,我想添加一个新词典
我做错了什么?你错过了
人
是数组,不是对象,所以
people: {[...this.state.people,
应该是
people: [...this.state.people,
你没有注意到
人
是一个数组,而不是一个对象,所以
people: {[...this.state.people,
应该是
people: [...this.state.people,
{[]}
只是无效的JavaScript。不能将对象文字放在这样的对象文字中。它与扩展元素无关。{[]}
只是无效的JavaScript。不能将对象文字放在这样的对象文字中。它与传播元素无关。