Reactjs 方法从另一个组件触发console.log
当我单击betnow时,该函数会从另一个组件触发一个console.log。betNow应该将来自stack的所有输入分组到一个公共数组中,但当我单击它时,它会呈现来自stack的控制台日志,并将我键入的所有值包含到一个数组中。一切正常,但并非如我所愿。父组件应显示包含所有值的公共数组。我不明白为什么会这样。有谁能解释一下为什么会有这样的反应?提前谢谢 父组件Reactjs 方法从另一个组件触发console.log,reactjs,Reactjs,当我单击betnow时,该函数会从另一个组件触发一个console.log。betNow应该将来自stack的所有输入分组到一个公共数组中,但当我单击它时,它会呈现来自stack的控制台日志,并将我键入的所有值包含到一个数组中。一切正常,但并非如我所愿。父组件应显示包含所有值的公共数组。我不明白为什么会这样。有谁能解释一下为什么会有这样的反应?提前谢谢 父组件 import React, { useState } from 'react'; import Button from '@materi
import React, { useState } from 'react';
import Button from '@material-ui/core/Button';
import FilterMenu from "./selectButton";
import FetchRandomBet from "./fetchRandomBets";
function Betslip() {
const data = [
{
value: 0,
label: "No Filter"
},
{
value: 1,
label: "Less than two"
},
{
value: 2,
label: "More than two"
},
]
const [selectedValue, setSelectedValue] = useState(0);
const [allStakes, setAllStakes] = useState([]);
const handleChange = obj => {
setSelectedValue(obj.value);
}
const betNow = () => {
const stakes = localStorage.getItem("stakes");
const jsnStake = JSON.parse(stakes) || [];
setAllStakes([...allStakes, jsnStake]);
}
return (
<div className="betslip">
<div className="betslip-top">
<h1 className="text">BETSLIP</h1>
<p className="text-two">BET WITH US!</p>
<div>
<FilterMenu
optionsProp={data}
valueProp={selectedValue}
onChangeProp={handleChange}
/>
</div>
</div>
<div>
<FetchRandomBet
valueProp={selectedValue}
/>
</div>
<Button
onClick={betNow}
className="betnow"
variant="contained"
>
Bet Now!
</Button>
</div>
);
}
export default Betslip;
import React, { useState, useEffect } from 'react';
function Stake() {
const [stakes, setStakes] = useState([]);
const addStake = (e) => {
e.preventDefault();
const newStake = e.target.stake.value;
setStakes([newStake]);
};
useEffect(() => {
const json = JSON.stringify(stakes);
localStorage.setItem("stakes", json);
}, [stakes]);
console.log(stakes)
return (
<div>
<form onSubmit={addStake}>
<input
style={{
marginLeft: "40px",
width: "50px"
}}
type="text"
name="stake"
required
/>
</form>
</div>
);
}
export default Stake;
import React,{useState}来自“React”;
从“@material ui/core/Button”导入按钮;
从“/selectButton”导入过滤器菜单;
从“/fetchRandomBets”导入FetchRandomBet;
函数Betslip(){
常数数据=[
{
值:0,
标签:“无过滤器”
},
{
价值:1,
标签:“少于两个”
},
{
价值:2,
标签:“两个以上”
},
]
常量[selectedValue,setSelectedValue]=使用状态(0);
const[allstacks,setallstacks]=useState([]);
常量handleChange=obj=>{
设置选定值(目标值);
}
常数betNow=()=>{
const stacks=localStorage.getItem(“stacks”);
const jsnStake=JSON.parse(木桩)| |[];
设置所有赌注([…所有赌注,jsnStake]);
}
返回(
贝特利普
与我们打赌
现在打赌!
);
}
出口违约金;
子组件
import React, { useState } from 'react';
import Button from '@material-ui/core/Button';
import FilterMenu from "./selectButton";
import FetchRandomBet from "./fetchRandomBets";
function Betslip() {
const data = [
{
value: 0,
label: "No Filter"
},
{
value: 1,
label: "Less than two"
},
{
value: 2,
label: "More than two"
},
]
const [selectedValue, setSelectedValue] = useState(0);
const [allStakes, setAllStakes] = useState([]);
const handleChange = obj => {
setSelectedValue(obj.value);
}
const betNow = () => {
const stakes = localStorage.getItem("stakes");
const jsnStake = JSON.parse(stakes) || [];
setAllStakes([...allStakes, jsnStake]);
}
return (
<div className="betslip">
<div className="betslip-top">
<h1 className="text">BETSLIP</h1>
<p className="text-two">BET WITH US!</p>
<div>
<FilterMenu
optionsProp={data}
valueProp={selectedValue}
onChangeProp={handleChange}
/>
</div>
</div>
<div>
<FetchRandomBet
valueProp={selectedValue}
/>
</div>
<Button
onClick={betNow}
className="betnow"
variant="contained"
>
Bet Now!
</Button>
</div>
);
}
export default Betslip;
import React, { useState, useEffect } from 'react';
function Stake() {
const [stakes, setStakes] = useState([]);
const addStake = (e) => {
e.preventDefault();
const newStake = e.target.stake.value;
setStakes([newStake]);
};
useEffect(() => {
const json = JSON.stringify(stakes);
localStorage.setItem("stakes", json);
}, [stakes]);
console.log(stakes)
return (
<div>
<form onSubmit={addStake}>
<input
style={{
marginLeft: "40px",
width: "50px"
}}
type="text"
name="stake"
required
/>
</form>
</div>
);
}
export default Stake;
import React,{useState,useffect}来自“React”;
功能桩(){
const[stacks,settakes]=useState([]);
const addstack=(e)=>{
e、 预防默认值();
const newStake=e.target.stack.value;
设置镜头([新闻镜头]);
};
useffect(()=>{
const json=json.stringify(木桩);
setItem(“木桩”,json);
},[股权];
控制台日志(木桩)
返回(
);
}
出口违约股权;
您的console.log函数将在每次呈现组件时运行,因为它不属于任何函数: