js方法-千位符 + 是否是數字

/* 千位分隔符 /
function setNoSeparate (no) {
let num = no || 0;
let numArr = num.toString().split(’.’);
let integers = numArr[0].replace(/\B(?=(\d{3})+KaTeX parse error: Expected 'EOF', got '}' at position 108: …ls : integers; }̲ /* 取消千位分隔符 */ …) | (^-?[1-9][0-9]$) | (^-?0{1}$)/).test(value + ‘’);
}
/*

• @desc 轉換成數字，可以輸入負數或小數
• @param {v} [String] 要轉換的字符串
• @param {places} [Number] 默認小數後兩位
• @return {b} [Boolean] true可以包括負數，false不包括負數
• 觸發事件只能是keyup事件
• */
  function formatNo(v, places = 2, b=false) {
  const p = Number(places) + 1
  const _ = b ? ‘^\-’ : ‘’;
  const reg = new RegExp(’[^\d’ + _ + ‘^\.]’, ‘g’);
  v = String(v).replace(reg, ‘’);
  if (!v) return ‘’;
  let [ds, dl, ms, ml] = [v.indexOf(’.’), v.lastIndexOf(’.’), v.indexOf(’-’), v.lastIndexOf(’-’)];
  while (ds !== dl) {
  v = v.slice(0, dl);
  ds = v.indexOf(’.’);
  dl = v.lastIndexOf(’.’);
  }
  while (ms !== ml) {
  v = v.slice(0, ml);
  ms = v.indexOf(’-’);
  ml = v.lastIndexOf(’-’);
  }
  v = v.includes(’-’) && ms ? v.slice(0, ms) : v;
  v = v.startsWith(’.’) ? 0 + v : (v[0] === ‘-’ && v[1] === ‘.’) ? ‘-0’ + v.slice(ds) : v;
  return v.slice(0, v.includes(’.’) ? ds + p : v.length);
  }