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Sometimes, we want to read JSON response with Axios and JavaScript.
In this article, we’ll look at how to read JSON response with Axios and JavaScript.
How to read JSON response with Axios and JavaScript?
To read JSON response with Axios and JavaScript, we get the response body from the data property.
For instance, we write
try {
const res = await axios.get("/end-point");
console.log(res.data);
} catch (error) {
// ...
}
to call axios.get to make a get request.
It returns a promise that has the response data.
We get the response body from res.data.
Conclusion
To read JSON response with Axios and JavaScript, we get the response body from the data property.
Sometimes, we want to fix TypeError: Cannot read property ‘props’ of undefined with React.
In this article, we’ll look at how to fix TypeError: Cannot read property ‘props’ of undefined with React.
How to fix TypeError: Cannot read property ‘props’ of undefined with React?
To fix TypeError: Cannot read property ‘props’ of undefined with React, we should make sure the value of this is correct.
For instance, we write
class Parent extends React.Component {
state = {
//...
};
onDelete = () => {
//...
};
render() {
return <Child onDelete={this.onDelete} />;
}
}
to add the onDelete function which has the value of this set to the Parent component instance since it’s an arrow function.
Conclusion
To fix TypeError: Cannot read property ‘props’ of undefined with React, we should make sure the value of this is correct.
Sometimes, we want to load local JSON file to show data in a HTML page using JavaScript.
In this article, we’ll look at how to load local JSON file to show data in a HTML page using JavaScript.
How to load local JSON file to show data in a HTML page using JavaScript?
To load local JSON file to show data in a HTML page using JavaScript, we define a global variable with the object.
For instance, we write
data = {
start: {
count: "5",
title: "start",
priorities: [
{
txt: "Work",
},
{
txt: "Time Sense",
},
{
txt: "Discipline",
}
],
},
};
in data.js to define the data global variable set to an object.
Then we write
<html>
<head> </head>
<body>
<script src="data.js"></script>
</body>
</html>
to load it in our HTML code.
Conclusion
To load local JSON file to show data in a HTML page using JavaScript, we define a global variable with the object.
Sometimes, we want to replace backslashes with JavaScript.
In this article, we’ll look at how to replace backslashes with JavaScript.
How to replace backslashes with JavaScript?
To replace backslashes with JavaScript, we call the string replace method.
For instance, we write
const replaced = str.replace(/\\/, "\\\\");
to call str.replace to replace backslashes by replacing /\\/ with "\\\\" double backslashes.
/\\/ matches the first instance of a backslash.
Conclusion
To replace backslashes with JavaScript, we call the string replace method.
Sometimes, we want to get coordinates of an svg element with JavaScript.
In this article, we’ll look at how to get coordinates of an svg element with JavaScript.
How to get coordinates of an svg element with JavaScript?
To get coordinates of an svg element with JavaScript, we call the getBoundingClientRect method.
For instance, we write
const { x, y } = element.getBoundingClientRect();
to get the x and y coordinates of the svg element with the getBoundingClientRect method.
Conclusion
To get coordinates of an svg element with JavaScript, we call the getBoundingClientRect method.
