30秒学会 JavaScript 片段 – How can I check if a JavaScript array includes a specific value?
Primitive values You can use Array.prototype.includes() to check if an array contains a primitive va...
Primitive values You can use Array.prototype.includes() to check if an array contains a primitive va...
Creates an error dispatcher. Use the useState() hook to create a state variable that holds the error...
Converts an object to a Map. Use Object.entries() to convert the object to an array of key-value pai...
Returns the weighted average of two or more numbers. Use sum() to sum the products of the numbers by...
Checks if a string contains only alphanumeric characters. Use RegExp.prototype.test() to check if th...
Converts an hsl() color string to an object with the values of each color. Use String.prototype.matc...
Creates a function that invokes fn with a given context, optionally prepending any additional suppli...
As discussed previously, you can use Array.prototype.includes() to check if an array includes a spec...
Filters out the elements of an array that have one of the specified values. Use Array.prototype.incl...
Gets the name of the weekday from a Date object. Use Date.prototype.toLocaleDateString() with the { ...