[英]How can i get multiple select options in react js.?
所以基本上我是新的反應和我試圖創建多個 select 選項使用 axio get 方法我有一個問題,我如何在這個文件中添加多個 select 選項我試圖用下面的復選框代碼做到這一點,但不斷收到錯誤的字符串在更改 function 時調用。 除此之外,由於 function 復選框沒有打開
項目清單
import React, { Component, Fragment } from "react";
import axios from "axios";
class Home extends Component {
state = {
users: []
};
componentDidMount() {
axios.get("https://jsonplaceholder.typicode.com/users").then(res => {
console.log(res);
this.setState({
users: res.data
});
});
}
showCheckboxes = () => {
let expanded = false;
const checkboxes = document.getElementById("checkboxes");
if (!expanded) {
checkboxes.style.display = "block";
expanded = true;
} else {
checkboxes.style.display = "none";
expanded = false;
}
};
onChangeValue = e => {
const value = e.target.value;
debugger;
};
render() {
const { users } = this.state;
const nameList = users.length ? (
<select className="custom-select">
{users.map((user, i) => {
return (
<option key={i} value={user.name}>
{" "}
{user.name}
</option>
);
})}
</select>
) : (
"No Data"
);
const usernameList = users.length ? (
<select className="custom-select">
{users.map((user, i) => {
return (
<option key={i} value={user.username}>
{user.username}
</option>
);
})}
</select>
) : (
"No Data"
);
const emailList = users.length ? (
<select className="custom-select">
{users.map((user, i) => {
return (
<option key={i} value={user.email}>
{user.email}
</option>
);
})}
</select>
) : (
"No Data"
);
return (
<Fragment>
{nameList}
<hr />
{usernameList}
<hr />
{emailList}
<hr />
<div className="multiselect">
<div className="selectBox">
<select>
<option>Select an option</option>
</select>
<div className="overSelect" onClick="showCheckboxes()"></div>
</div>
<div id="checkboxes">
<label htmlFor="one">
<input type="checkbox" id="one" />
First checkbox
</label>
<label htmlFor="two">
<input type="checkbox" id="two" />
Second checkbox
</label>
<label htmlFor="three">
<input type="checkbox" id="three" />
Third checkbox
</label>
</div>
</div>
</Fragment>
);
}
}
export default Home;
這一行:
<div className="overSelect" onClick="showCheckboxes()"></div>
至
<div className="overSelect" onClick={this.showCheckboxes}></div>
您可以使用 GitHub 中的這個開源組件: https://github.com/JedWatson/react-select 。
看看這篇文章,它的結構非常好,演示了你需要什么。 如何在 reactjs 中獲得多個 select 選項
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