在运行时将输入标签转换为骆驼大小写

Question

I am using React with Formik & Yup, currently I have a input field which is as f

<input
              type="fname"
              name="fname"
              onChange={handleChange}
              onBlur={handleBlur}
              value={values.fname}
              className="form-control inp_text"
              id="fname"
            />

I have the Yup logic as

  fname: Yup.string()
    .required("First Name is a required field")
    .min(1, "Name is too Short")
    .max(20, "Name is too Big")
    .matches(
      /^[A-Z][A-Za-z]*( [A-Z][A-Za-z]*)*$/,
      "Not a correct format. Eg. Rahul Kumar "
    ),

which is working when I manually write it but my requirement is that if I write at run time only it should covert to Camel case

for Example

abhimanu singh -> Abhimanu Singh Abhi Raj -> Abhi Raj

Like this can anyone help me or guide me

Answer 1

You can convert the value to Camel Case before calling handleChange like:

const handleChangeWithCamelize = (e) => {
  const copyE = { ...e };
  copyE.target.value = camelize(copyE.target.value);
  handleChange(e);
};

<input
  id="fname"
  type="text"
  value={values.fname}
  onChange={handleChangeWithCamelize}
  onBlur={handleBlur}
  className={
    errors.fname && touched.fname
      ? "text-input error"
      : "text-input"
  }
/>

and camel case converter function will be like:

function camelize(text) {
  const words = text.split(" ");

  for (let i = 0; i < words.length; i++) {
    if (words[i] && words[i].length > 0) {
      words[i] = words[i][0].toUpperCase() + words[i].substr(1);
    }
  }

  return words.join(" ");
}

You can take a look at this sandbox for a live working example.

Answer 2

The camelize function @Ahmet Emre Kılınç posted can be simplified with a single regex:

function camelize(text) {
 return text.replace(/\b[a-z]/g, m => m.toUpperCase());
}