Author: John Au-Yeung

Sometimes, we want to disable eslint rule max line length for paragraph in template of Vue.js.

In this article, we’ll look at how to disable eslint rule max line length for paragraph in template of Vue.js.

How to disable eslint rule max line length for paragraph in template of Vue.js?

To disable eslint rule max line length for paragraph in template of Vue.js, we can add a comment to disable the rule for one or more lines.

For instance, we write

<template>
  <!-- eslint-disable-next-line max-len -->
  <my-long-component>...</my-long-component>
</template>

to disable the line length eslint rule for the line right after the comment.

And we write

<template>
  <!-- eslint-disable max-len -->
  <my-long-component> ... </my-long-component>
  <!-- eslint-enable max-len -->
</template>

to disable the line length eslint rule for the line between the disable and enable comment.

Conclusion

To disable eslint rule max line length for paragraph in template of Vue.js, we can add a comment to disable the rule for one or more lines.

Sometimes, we want to make a POST request with Fetch API and JavaScript.

In this article, we’ll look at how to make a POST request with Fetch API and JavaScript.

How to make a POST request with Fetch API and JavaScript?

To make a POST request with Fetch API and JavaScript, we call fetch with the method option set to 'post'.

For instance, we write

const res = await fetch("http://example.com/api/endpoint/", {
  method: "post",
  headers: {
    Accept: "application/json",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    name,
    password,
  }),
});

to call fetch with the URL to make the request to and an object with some request options.

In the object, we set method to 'post' to make a post request.

We set headers to an object with the request headers keys and values.

And we set body to a JSON string with the request body.

Conclusion

To make a POST request with Fetch API and JavaScript, we call fetch with the method option set to 'post'.

Sometimes, we want to remove array element by value with JavaScript.

In this article, we’ll look at how to remove array element by value with JavaScript.

How to remove array element by value with JavaScript?

To remove array element by value with JavaScript, we use the indexOf method.

For instance, we write

const arr = ["orange", "red", "black", "white"];
const index = arr.indexOf("red");
if (index >= 0) {
  arr.splice(index, 1);
}

to call arr.indexOf with 'red' to get the index of 'red' in arr.

Then we call splice to remove 'red' by calling it with index and 1.

Conclusion

To remove array element by value with JavaScript, we use the indexOf method.

Sometimes, we want to change onClick handler dynamically with JavaScript.

In this article, we’ll look at how to change onClick handler dynamically with JavaScript.

How to change onClick handler dynamically with JavaScript?

To change onClick handler dynamically with JavaScript, we set the onclick property of an element.

For instance, we write

document.getElementById("foo").onclick = () => {
  alert("foo");
};

to select the element we want to attach the click listener to with getElementById.

Then we set its onclick property to a function that shows an alert when we click on the element.

Conclusion

To change onClick handler dynamically with JavaScript, we set the onclick property of an element.

Sometimes, we want to validate phone number with Yup and JavaScript.

In this article, we’ll look at how to validate phone number with Yup and JavaScript.

How to validate phone number with Yup and JavaScript?

To validate phone number with Yup and JavaScript, we use the matches method

For instance, we write

const phoneRegExp =
  /^((\\+[1-9]{1,4}[ \\-]*)|(\\([0-9]{2,3}\\)[ \\-]*)|([0-9]{2,4})[ \\-]*)*?[0-9]{3,4}?[ \\-]*[0-9]{3,4}?$/;

const schema = yup.object().shape({
  phone: yup
    .string()
    .matches(phoneRegExp, {
      message: "Invalid phone number",
      excludeEmptyString: false,
    })
    .required(),
});

to call yup.string to validate that phone is a string.

Then we call matches to check if phone matches the phone regex value.

We check all the segments of any phone number in the world with the regex.

Conclusion

To validate phone number with Yup and JavaScript, we use the matches method