如何防止在密码输入字段中输入空格/空格。 ReactJs

时间:2019-03-06 07:29:55

标签: javascript reactjs semantic-ui-react

在这里,我提供了我要在密码输入字段中输入字符的代码,并且我不想在其中输入空格/空格,而是在其中输入了空格/空格,而不是在我打印输入值时不包含空格/ whitespace。请帮助我解决问题。

CodeSandBox Demo

代码-

import React from "react";
import ReactDOM from "react-dom";
import "./styles.css";
import { Form, Input, Label } from "semantic-ui-react";

class App extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      inputFieldData: {
        pass: {
          val: "",
          error: false
        }
      }
    };
  }

  inputChange = e => {
    // prevent not to enter space charactes in password field while registering
    const re = /^\S*$/;
    let inputFieldData = this.state.inputFieldData;
    const name = e.target.name;
    if (re.test(e.target.value)) {
      inputFieldData[name]["val"] = e.target.value;
      console.log(e.target.value);
    }
    this.setState({ inputFieldData });
  };

  render() {
    const { inputFieldData } = this.state;

    return (
      <div className="App">
        <h1>Input box does not contain space in it</h1>
        <h3>Input Value: {inputFieldData["pass"]["val"]}</h3>
        <Form className="register-form">
          <Form.Field>
            <Input
              type="password"
              icon="user circle"
              name="pass"
              iconPosition="left"
              placeholder="Enter Password"
              onChange={this.inputChange}
              error={inputFieldData["pass"]["error"]}
            />
            {inputFieldData["pass"]["error"] && (
              <Label basic color="red" pointing>
                Field can not be empty
              </Label>
            )}
          </Form.Field>
        </Form>
      </div>
    );
  }
}

const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);

4 个答案:

答案 0 :(得分:1)

您需要将输入的值设置为inputFieldData.pass.val
否则为not bound to the state of your component

        <Input
          value={inputFieldData.pass.val}
          type="password"
          icon="user circle"
          name="pass"
          iconPosition="left"
          placeholder="Enter Password"
          onChange={this.inputChange}
          error={inputFieldData["pass"]["error"]}
        />

答案 1 :(得分:1)

我用正则表达式解决了这个问题

str.replace(/\s/g, '')

答案 2 :(得分:0)

您需要通过将value属性添加到input组件来使用受控组件模式(请参见此处https://reactjs.org/docs/forms.html#controlled-components)。

然后可以在handleChange函数中添加空格修剪逻辑。

这里是一个示例:https://codesandbox.io/s/kkpr53k36r

答案 3 :(得分:-1)

只需在 handleOnChange 函数中这样做:

 handleOnChange = (e) => {
    this.setState({
      [e.target.name]: e.target.value.split(" ").join("")
    });
  };