Es6 Array Limit First n Elements using Array.slice()
Teresia Wachira
Introduction We get the first n elements easily using the Array.slice() method. The slice() method returns selected elements in an array, as a new array but does not modify the…
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Error: Can’t render headers after they are sent to the client [nodejs]
Imran Alam
The “Error: Can’t render headers after they are sent to the client” is a very common error in Node.js. This error is caused by the fact that Node.js buffers the…
Unchecked runtime.lastError: The message port closed before a response was received
Akash Mittal
Chrome throws Unchecked runtime.lastError: The message port closed before a response was received when either there is a conflict with an extension or some of the onMessage listeners in your…
devtools failed to parse sourcemap
If you got the warning that devtools failed to parse sourcemap then you need to know that either browser is not able to find sourcemap location or file is corrupted.…
.map is not a function
map() can only be used with Arrays. So, if you are getting error .map is not a function, you are probably using it on either the objects or other variables…
React typeerror: cannot read property ‘map’ of undefined
React throws typeerror: cannot read property ‘map’ of undefined, when we try to use anything but arrays. According to MDN documentation – The map() method creates a new array populated with the results of…
React convert JSON to CSV
React convert JSON to CSV using JSONToCSVConvertor function. Suppose you have a table (GUI react table tool) and you want to export it into excel, then this function will come…
How to convert number from decimal to binary in Javascript and React?
To convert a number from decimal to binary, you can use (num >>> 0).toString(2). This will work in JavaScript, JQuery, React, React Native, VueJs and every other javascript variant framework…
How to convert a string to a number in JavaScript?
It is essential to convert a string to a number in javascript in order to do arithmetic calculations on them. Sometimes when we fetch data from database, the numeric values…
How to uppercase the first letter of a string in JavaScript?
To uppercase the first letter of a string in JavaScript, we can use toUpperCase() method. But it will convert the whole string to upper case. To selectively convert the first…