您可以借助下面的RegEx实现此要求

/<([^> ]+)([^>]*)>([^<]+)(<\/\1>)/

现场演示**：**

const arr = [
  "<p class='item'>text</p>",
  "<h1>hello</h1>"
];

const regExp = /<([^> ]+)([^>]*)>([^<]+)(<\/\1>)/;

arr.forEach((el, index) => {
  const elementContent = el.match(regExp)[3];
  arr[index] = el.replace(el.match(regExp)[3], 'replaced text');
})

console.log(arr);

试试这个：

let array = [
  "<p class='item'>a lot of text</p>",
  "<h1>hello</h1>"
]

function changeElementText(_array, _index, _newText) {
  return _array.map((e, i) => {
    if (i === _index) return e.replace(/>[\s\S]*</g, `>${_newText}<`)
    return e
  })
}

console.log(changeElementText(array, 0, 'Text Changed! 🦊'))
// [ 
// "<p class='item'>Text Changed! 🦊</p>", 
// '<h1>hello</h1>' 
//]
// (This returns a copy of the original array)

// if you want to overwrite the original value
array = changeElementText(array, 0, 'Text Changed! 🦊')

字符串