2023年11月23日
30秒学会 JavaScript 片段 – What is the only value not equal to itself in JavaScript?
NaN (Not-a-Number) is the only JavaScript value not equal to itself when comparing with any of the c...
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2023年11月8日
30秒学会 JavaScript 片段 – Collection is empty
Checks if the a value is an empty object/collection, has no enumerable properties or is any type tha...
2023年10月27日
30秒学会 JavaScript 片段 – Convert a string to a boolean
Sometimes, one might run into the problem of converting the string representation of a value into th...
2023年8月18日
30秒学会 JavaScript 片段 – What’s the difference between undeclared, undefined and null in JavaScript?
undeclared A variable is undeclared if it has not been declared with an appropriate keyword (i.e. va...
2023年8月17日
30秒学会 JavaScript 片段 – What’s the difference between Object.is() and the triple equals operator in JavaScript?
If you want to check equality in JavaScript, there are two comparison operators, which are explained...
2023年7月5日
30秒学会 JavaScript 片段 – JavaScript’s numeric separators explained
Numeric separators are a lesser-known JavaScript syntactic sugar that can make working with numeric ...
2023年6月13日
30秒学会 JavaScript 片段 – What is the difference between JavaScript’s equality operators?
JavaScript provides two equality operators used for comparisons: The double equals (==), also known ...
2023年5月9日
30秒学会 JavaScript 片段 – Boolean traps and how to avoid them
I recently came across the concept of Boolean traps and it instantly resonated with me due to the vo...
2023年5月9日
30秒学会 JavaScript 片段 – What is the difference between an expression and a statement in JavaScript?
JavaScript distinguishes expressions and statements. An expression is any valid unit of code that re...
2023年3月25日
30秒学会 JavaScript 片段 – What is hoisting in JavaScript?
Before your JavaScript code is executed, it is first parsed and compiled (just in time compilation/J...