floatValidator

floatValidator(event) {
    const value = event.target.value;
    const key = event.key;
    const newValue = value + key;

    const patternZeroInBeginning = /^0+(\d)/;
    const patternNumber = /\d/;

    if ((key !== '.' && !patternNumber.test(key)) || value && key === '.' && value.indexOf('.') > 0) {
      event.preventDefault();
      return;
    }

    if (!value && key === '.') {
      event.preventDefault();
      event.srcElement.value = '0.';
    } else if (patternZeroInBeginning.test(newValue)) {
      event.preventDefault();
      event.srcElement.value = key;
    }
  }