[英]a problem with the shopping cart button in react
I'm trying to make a button where every time I click it adds the item to the cart, but the problem is that when I click nothing happens, as if it were not even a button:我正在尝试制作一个按钮,每次我点击它都会将商品添加到购物车,但问题是当我点击时什么也没有发生,好像它甚至不是一个按钮:
Product.js :产品.js :
import React from 'react'
import './Product.css'
import {useStateValue} from './StateProvider'
function Products({id,title,image,price,rating}) {
const [state,dispatch] = useStateValue();
const addToBasket = () => {
dispatch({
type: 'ADD_TO_BASKET',
item:{
id: id,
title: title,
image: image,
price: price,
rating: rating,
},
});
};
return (
<div className="product">
<div className="product_info">
<p>{title}</p>
<p className="product_price">
<small>$</small>
<strong>{price}</strong>
</p>
<div className="product_rating">
{Array(rating).fill().map((_,i) => (
<p>⭐</p>
))}
</div>
</div>
<img src={image} alt="" />
<button onClick={addToBasket}>Add to Basket</button>
</div>
);
}
export default Products;
Reducer.js :减速器.js:
export const initialState ={
basket:[],
};
const reducer =(state,action)=>{
console.log(action);
switch(action.type){
case "ADD_TO_BASKET":
return {
...state,
basket:[...state.basket,action.item],
};
default:
return state;
}
};
export default reducer;
Index.js :索引.js :
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import reportWebVitals from './reportWebVitals';
import { StateProvider } from './StateProvider';
import reducer, {initialState} from './reducer'
ReactDOM.render(
<React.StrictMode>
<StateProvider initialState={initialState} reducer={reducer}>
<App />
</StateProvider>
</React.StrictMode>,
document.getElementById('root')
);
reportWebVitals();
Header.js (where I put the basket logo): Header.js(我放篮子标志的地方):
import React from 'react';
import './Header.css';
import SearchIcon from '@material-ui/icons/Search'
import ShopppingBasketIcon from '@material-ui/icons/ShoppingBasket'
import {Link} from 'react-router-dom'
import { useStateValue } from "./StateProvider"
function Header() {
const [{basket},dispatch] = useStateValue();
return (
<div className="header">
<Link to="/">
<img className="header__logo" src="http://pngimg.com/uploads/amazon/amazon_PNG11.png"/>
</Link>
<div className="header__search">
<input className="header__searchInput" type="text"/>
<SearchIcon className="header__searchIcon"/>
</div>
<div className="header__nav">
<Link to="/checkout">
<div className="header__optionBasket">
<ShopppingBasketIcon/>
<span className="header__optionLineTwo
header__basketCount">{basket?.lenght}</span>
</div>
</Link>
</div>
</div>
)
}
export default Header
therefore, where I find the problem is that when I click "add to cart" it does not click anything, as if the button did not exist and does not take any action..因此,我发现问题的地方在于,当我单击“添加到购物车”时,它没有单击任何内容,就好像该按钮不存在并且不采取任何操作一样..
try preventing default behaviour like so尝试防止这样的默认行为
const addToBasket = (e) => {
e.preventDefault();
dispatch({
type: 'ADD_TO_BASKET',
item:{
id: id,
title: title,
image: image,
price: price,
rating: rating,
},
});
};
and you can also try setting a type on the button你也可以尝试在按钮上设置一个类型
<button type="button" onClick={addToBasket}>Add to Basket</button>
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