score:38

Accepted answer

I found another solution here.

<TextField
    required
    id="required"
    label="Required"
    defaultValue="Hello World"
    onInput = {(e) =>{
        e.target.value = Math.max(0, parseInt(e.target.value) ).toString().slice(0,12)
    }}/>

score:1

The material-design <TextField /> component haven't any length property.

You can create yours in the onChange() method.

updateTextField(event,value){
  if(value.length <= 12){
     //Update your state
  }
  else{
    //Value length is biggest than 12
  }
}

<TextField
    id="SigninTextfield"
    label="Aadhaar number"
    id="Aadhar"
    lineDirection="center"
    required={true}
    type="number"
    onChange={(e,v) => this.updateTextField(e,v)}
    style={styles.rootstyle}
    erorText="Please enter only 12 digits number"
/>

score:1

In your change handler, just write.

if (event.target.value.length !== maxLength ) return false; 

score:1

I had a similar issue, but with TextareaAutosize. Unfortunately,

inputProps={{ maxLength: 12 }}

doesn't work with TextareaAutosize.

The below workaround works for TextareaAutosize and for both text and numbers. Inspired by the accepted answer to this question - https://stackoverflow.com/a/49130234/5236534

onInput = {(e) =>{
    e.target.value = (e.target.value).toString().slice(0,10)

import * as React from 'react';
import TextareaAutosize from '@mui/material/TextareaAutosize';

export default function MinHeightTextarea() {
  return (
    <TextareaAutosize
      aria-label="minimum height"
      minRows={3}
      placeholder="Minimum 3 rows"
      style={{ width: 200 }}
      onInput = {(e) =>{
        e.target.value = (e.target.value).toString().slice(0,10)
    }}
        
    />
  );
}

Link to demo: Limiting character length in MUI TextareaAutosize

score:2

The accepted answer won't work in Firefox for large numbers (greater than 16 digits). Numbers just behaves in a weird way.

For a 22 length field we ended up using this:

<TextField
  required
  validateOnBlur
  field="cbu"
  label="22 dígitos del CBU"
  validate={validate.required}
  type="text"
  inputProps={
    {maxLength: 22}
  }
  onInput={(e) => { e.target.value = e.target.value.replace(/[^0-9]/g, '') }}

/>

Basically, native maxLength constraint for text fields, plus a conversion from string to numbers "on the fly".

Improvement

Also you may prefer to make this reusable and more semantic.

# constraints.js
const onlyNumbers = (e) => { e.target.value = e.target.value.replace(/[^0-9]/g, '') };

# form.js
<TextField
  field="cbu"
  label="22 dígitos del CBU" 
  inputProps={
    {maxLength: 22}
  }
  onInput={(e) => onlyNumbers(e) }

score:5

I discovered something weird on the behavior between TextField and Input from Material UI

They are very similar to each other, the problem I see is the following:

On the TextField component, if you use InputProps with capital "I", the Adorments are shown, but in the other hand if you use it as lowercase "inputProps", the maxLength Html attribute is TAKEN as valid, but not the adorments

I ended up using INPUT instead of a TextField so you can use adorments in

               <TextField
                variant="outlined"
                required
                fullWidth
                error={errors.email}
                id="email"
                label={t("signup-page.label-email")}
                name="email"
                onChange={handleChange}
                inputProps={{
                  endAdornment: (
                    <InputAdornment position="end">
                      <IconButton aria-label="toggle password visibility">
                        <EmailIcon />
                      </IconButton>
                    </InputAdornment>
                  ),
                  maxLength: 120,
                }}
              />

in the above code the adorment is ignored, but maxLength taken used as "inputProps" camel case

The below code is a working example, as you might see, I embraced it as in the old style within a Form Control, the input label and the input "outlinedInput"

        <FormControl variant="outlined" fullWidth>
        <InputLabel htmlFor="firstName">Password</InputLabel>
        <OutlinedInput
          value={values.firstName}
          autoComplete="outlined"
          name="firstName"
          variant="outlined"
          required
          fullWidth
          error={errors.firstName}
          id="firstName"
          label={t("signup-page.label-firstname")}
          onChange={handleChange}
          autoFocus
          inputProps={{ maxLength: 32 }}
        />
      </FormControl>

Solution. My final recommendation, use an OutlinedInput instead of a TextField, so you can put in a separated way Adorments and also maxLength

Below a working example with FormControl OutlinedInput, inputProps - maxLength and an end Adorment Icon

      <FormControl variant="outlined" fullWidth>
        <InputLabel htmlFor="password">Password</InputLabel>
        <OutlinedInput
          value={values.passwordConfirm}
          variant="outlined"
          required
          fullWidth
          error={errors.passwordConfirm}
          name="passwordConfirm"
          label={t("signup-page.label-password-confirm")}
          type={values.showPasswordConfirm ? "text" : "password"}
          id="password-confirm"
          onChange={handleChange}
          inputProps= {{maxLength:32}}
          endAdornment= {
              <InputAdornment position="end">
                <IconButton
                  aria-label="toggle password visibility"
                  onClick={handleClickShowPassword("passwordConfirm")}
                  onMouseDown={handleMouseDownPassword}
                >
                  {values.showPasswordConfirm ? (
                    <Visibility />
                  ) : (
                    <VisibilityOff />
                  )}
                </IconButton>
              </InputAdornment>
          }
        />
        {errors.passwordConfirm && (
          <p className="error"> {errors.passwordConfirm} </p>
        )}
      </FormControl>

score:5

If you're using MUI 5, version 5.0.6, due to a support for legacy, you will have to do something like this,

            <TextField
              id="standard-textarea"
              label="A label"
              placeholder="Some text here"
              multiline
              variant="standard"
              defaultValue={"Hello"}
              inputProps={{
                maxLength: 255,
              }}
              InputProps={{
                disableUnderline: true,
              }}
            />

The TextField supports both inputProps and InputProps, but some properties don't work vice versa.

maxLength does not work as expected in InputProps, and a property like disableUnderline for the MUI 5 does not work as expected in inputProps.

Be careful with a possible typo with the i.

See the API for more information, https://mui.com/api/text-field/.

score:8

Is it worth noting that Material-ui <TextField /> component doesn not have a maxlength property. However, the original html <input> does. So you don't really need to create any extra function to get this to work. Just use the base <input> attributes using inputProps.

The actual answer is this:

inputProps={
    {maxLength: 22}
}
// Result => <input maxlength="yourvalue" />

What this does is it sets the maxlength attribute of the underlying <input> resulting in: <input maxlength="yourvalue" />. Another important thing to note here is that you use inputProps and not InputProps. The one you're targeting is the small letter inputProps.

score:10

      <TextField
        id="username"
        name="username"
        label={translate('username')}
        onChange={handleChange}
        onBlur={handleBlur}
        value={values.username}
        error={Boolean(errors.username) && touched.username}
        helperText={(errors.username && touched.username && translate(errors.username))}
        required
        inputProps={{maxLength :20}}

      />

score:17

    <TextField
      autoFocus={true}
      name="name"
      onChange={handleChange}
      placeholder="placeholder"
      id="filled-basic"
      variant="filled"
      size="small"
      fullWidth
      inputProps={{
        maxLength: 25,
      }}
      InputProps={{
        startAdornment: (
          <InputAdornment position="start">
            <SearchIcon />
          </InputAdornment>
        ),
      }}
    />

score:210

You can set the maxLength property for limiting the text in text box.

Instead of onChange method you can pass maxLength to the inputProps props of material-ui TextField.

<TextField
    required
    id="required"
    label="Required"
    defaultValue="Hello World"
    inputProps={{ maxLength: 12 }}
/>

Basically we can edit all input element's native attrs via inputProps object.

Link to TextField Api


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