How to use the wcwidth function in wcwidth

'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}"`;
	}
}