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How to fix document.body null error with JavaScript?

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Sometimes, we want to fix document.body null error with JavaScript.

In this article, we’ll look at how to fix document.body null error with JavaScript.

How to fix document.body null error with JavaScript?

To fix document.body null error with JavaScript, we should reference document.body only when the page is loaded.

For instance, we write

window.onload = () => {
  const mySpan = document.createElement("span");
  mySpan.innerHTML = "This is my span!";
  mySpan.style.color = "red";
  document.body.appendChild(mySpan);
};

to call document.body.appendChild in the window.onload method, which runs when the page is loaded.

If the page is loaded, that means the body element is loaded and document.body is available.

Conclusion

To fix document.body null error with JavaScript, we should reference document.body only when the page is loaded.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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