getElementById检查是否包含维度[closed]

const
  // This regex will match a text which:
  // - starts with one or more digits
  // - followed by an 'x'
  // - followed by one or more digits
  // - followed by an 'x'
  // - followed by one or more digits
  regexDimension = /^\d+x\d+x\d+$/;
  
// Get the elements from the DOM which may contain a dimension and iterate
// over all those elements.
document.querySelectorAll('.item').forEach(item => {
  // Check if the value of the element matches the regex.
  if (regexDimension.test(item.value.trim())) {
    // Do something with the element.
    item.style.backgroundColor = 'lightgreen';
    console.log(`Dimension found: ${item.value} (id=${item.id})`);
  }
});

<input class="item" type="text" value="1" id="not-me">
<input class="item" type="text" value="1x2" id="not-me-either">
<input class="item" type="text" value="1x2x3" id="pick-me">
<input class="item" type="text" value="3512x525x88" id="or-pick-me">