Reactjs 为什么React/Redux表单中的输入会将数字更改为字符串?
我正在React和Redux中构建一个表单。当我在表单中输入赢和输时,赢和输的输入将数字输入更改为字符串。表单未保存,因为数据类型应为数字。当我将数字输入表单时,我不希望它变成字符串Reactjs 为什么React/Redux表单中的输入会将数字更改为字符串?,reactjs,redux,react-redux,Reactjs,Redux,React Redux,我正在React和Redux中构建一个表单。当我在表单中输入赢和输时,赢和输的输入将数字输入更改为字符串。表单未保存,因为数据类型应为数字。当我将数字输入表单时,我不希望它变成字符串 class TeamForm extends Component { handleOnChange = event => { const { name, value } = event.target; const currentTeamFormData = Object.ass
class TeamForm extends Component {
handleOnChange = event => {
const { name, value } = event.target;
const currentTeamFormData = Object.assign({},
this.props.teamFormData, {
[name]: value
});
this.props.updateTeamFormData(currentTeamFormData);
};
handleOnSubmit = event => {
event.preventDefault();
this.props.createTeam(this.props.teamFormData);
};
render() {
const { name, wins, losses, logo_url } = this.props.teamFormData;
return (
<div className="teamForm">
<h1>Add a team to the League</h1>
<form onSubmit={this.handleOnSubmit}>
<div>
<label htmlFor="name">Name:</label>
<input
type="text"
onChange={this.handleOnChange}
name="name"
value={name}
/>
</div>
<div>
<label htmlFor="wins">Wins:</label>
<input
type="number"
onChange={this.handleOnChange}
name="wins"
value={wins}
/>
</div>
<div>
<label htmlFor="losses">Losses:</label>
<input
type="number"
onChange={this.handleOnChange}
name="losses"
value={losses}
/>
</div>
<div>
<label htmlFor="logo_url">Logo url:</label>
<input
type="text"
onChange={this.handleOnChange}
name="logo_url"
value={logo_url}
/>
</div>
<button type="submit">Add Team</button>
</form>
</div>
);
}
}
export const updateTeamFormData = teamFormData => {
debugger;
return {
type: "UPDATED_DATA",
teamFormData
};
};
export const resetTeamForm = () => {
return {
type: "RESET_TEAM_FORM"
};
};
const initialState = {
name: "",
wins: 0,
losses: 0,
logo_url: ""
};
export default (state = initialState, action) => {
switch (action.type) {
case "UPDATED_DATA":
return action.teamFormData;
case "RESET_TEAM_FORM":
return initialState;
default:
return state;
}
};
我想问题可能是我的更改了表单的
class TeamForm extends Component {
handleOnChange = event => {
const { name, value } = event.target;
const currentTeamFormData = Object.assign({},
this.props.teamFormData, {
[name]: value
});
this.props.updateTeamFormData(currentTeamFormData);
};
handleOnSubmit = event => {
event.preventDefault();
this.props.createTeam(this.props.teamFormData);
};
render() {
const { name, wins, losses, logo_url } = this.props.teamFormData;
return (
<div className="teamForm">
<h1>Add a team to the League</h1>
<form onSubmit={this.handleOnSubmit}>
<div>
<label htmlFor="name">Name:</label>
<input
type="text"
onChange={this.handleOnChange}
name="name"
value={name}
/>
</div>
<div>
<label htmlFor="wins">Wins:</label>
<input
type="number"
onChange={this.handleOnChange}
name="wins"
value={wins}
/>
</div>
<div>
<label htmlFor="losses">Losses:</label>
<input
type="number"
onChange={this.handleOnChange}
name="losses"
value={losses}
/>
</div>
<div>
<label htmlFor="logo_url">Logo url:</label>
<input
type="text"
onChange={this.handleOnChange}
name="logo_url"
value={logo_url}
/>
</div>
<button type="submit">Add Team</button>
</form>
</div>
);
}
}
export const updateTeamFormData = teamFormData => {
debugger;
return {
type: "UPDATED_DATA",
teamFormData
};
};
export const resetTeamForm = () => {
return {
type: "RESET_TEAM_FORM"
};
};
const initialState = {
name: "",
wins: 0,
losses: 0,
logo_url: ""
};
export default (state = initialState, action) => {
switch (action.type) {
case "UPDATED_DATA":
return action.teamFormData;
case "RESET_TEAM_FORM":
return initialState;
default:
return state;
}
};
任何帮助或见解都将不胜感激。谢谢 无论输入类型如何,输入值始终作为字符串发送给您。
当您使用input type=“number”
时,它只会帮助浏览器显示数字键盘
在调用操作之前,或者在操作本身内部,您必须将值强制转换为IntparseInt(myValue)
。更新:由于它是一种常规形式,您可以在事件侦听器中处理此问题:
handleOnChange = event => {
const { name, value, type } = event.target;
const currentTeamFormData = Object.assign({}, this.props.teamFormData, {
[name]: type === "number" ? parseInt(value, 10) : value
});
this.props.updateTeamFormData(currentTeamFormData);
};
在这里,我检查input.type
,这样handleOnChange
就可以保持足够的抽象/通用性,但您可以使用任何其他技术来区分数字类型的输入(甚至可以创建单独的处理程序)。其目的是查看它是否为数字类型,如果是,请使用parseInt
将其转换为数字
这里有一个更新的(注意,我用setState
演示了核心概念,但这不是必须的;您可以像现在这样使用redux操作)
旧答案;为子孙后代离开这里
Redux表单为此提供了一个函数:
<input
type="number"
onChange={this.handleOnChange}
name="wins"
value={wins}
parse={value => parseInt(value, 10)}
/>
parseInt(值,10)}
/>
请注意,type=“number”
对表单存储数据的方式没有影响。它只对现代浏览器有用,因为现代浏览器可以显示数字键盘,从而使表单更加友好。解析行不会解析传递到值中的数字。对此有其他建议吗?它有:。查看添加parseInt
后存储值如何更改为数字。这里是沙盒:我没有使用redux表单。我在哪里将parseInt
应用于当前表单输入。您将其标记为redux表单!:)查看我的更新。