How to use wcwidth - 9 common examples

'form.attendee_name': function () {
      this.form.attendee_name_wclen = wcWidth(this.form.attendee_name);
    },
    // eslint-disable-next-line

function textColumnCount(text: string): number {
  // leaving the wrapper for now since its been changed so much recently
  // emojis are hard 😓
  return wcwidth(stripAnsi(text));
}

checkForm() {
      let msg = '';
      let stat = true;
      if (this.form.attendee_name === '') {
        msg = '名稱為必填欄位';
        stat = false;
      } else if (wcWidth(this.form.attendee_name) > 20) {
        msg = '名稱超過 20 個字符';
        stat = false;
      } else if (wcWidth(this.form.summary) > 200) {
        msg = '發言摘要超過 200 個字符';
        stat = false;
      }
      return {
        status: stat,
        message: msg,
      };
    },
    dangerAlert(msg) {

export function getWidth(widthType, str) {
	switch (widthType) {
		case 'length':
			return str.length;
		case 'wcwidth':
			return wcwidth(str);
		case 'dbcs':
			return dbcswidth(str);
		default:
			throw `Invalid widthType "${widthType}"`;
	}
}

      line => Math.max(1, Math.ceil(wcwidth(stripAnsi(line)) / columns))
    )

checkForm() {
      let msg = '';
      let stat = true;
      if (this.form.attendee_name === '') {
        msg = '名稱為必填欄位';
        stat = false;
      } else if (wcWidth(this.form.attendee_name) > 20) {
        msg = '名稱超過 20 個字符';
        stat = false;
      } else if (wcWidth(this.form.summary) > 200) {
        msg = '發言摘要超過 200 個字符';
        stat = false;
      }
      return {
        status: stat,
        message: msg,
      };
    },
    dangerAlert(msg) {

'form.summary': function () {
      this.form.summary_wclen = wcWidth(this.form.summary);
    },
  },

export function getWidth(widthType: string, str: string): number {
	switch (widthType) {
		case 'length':
			return str.length;
		case 'wcwidth':
			return wcwidth(str);
		case 'dbcs':
			return dbcswidth(str);
		default:
			throw `Invalid widthType "${widthType}"`;
	}
}

if (options.char == null) {
    options.char = ' ';
  }
  if (options.strip == null) {
    options.strip = false;
  }
  if (typeof text !== 'string') {
    text = text.toString();
  }
  textnocolors = null;
  pad = '';
  if (options.colors) {
    escapecolor = /\x1B\[(?:[0-9]{1,2}(?:;[0-9]{1,2})?)?[m|K]/g;
    textnocolors = text.replace(escapecolor, '');
  }
  padlength = options.fixed_width ? length - (textnocolors || text).length : length - wcwidth.config(options.wcwidth_options)(textnocolors || text);
  if (padlength < 0) {
    if (options.strip) {
      if (invert) {
        return text.substr(length * -1);
      } else {
        return text.substr(0, length);
      }
    }
    return text;
  }
  pad += options.char.repeat(padlength);
  if (invert) {
    return pad + text;
  } else {
    return text + pad;
  }