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Does findIndex work in IE?

Does findIndex work in IE?

It will work in almost all the browsers but not in IE 11.

What is the difference between findIndex and indexOf?

findIndex – Returns the index of the first element in the array where predicate is true, and -1 otherwise. indexOf – Returns the index of the first occurrence of a value in an array.

How do you find the index of an object in an array?

JavaScript Array findIndex() Method The findIndex() method executes the function once for each element present in the array: If it finds an array element where the function returns a true value, findIndex() returns the index of that array element (and does not check the remaining values)

What is indexOf JavaScript?

JavaScript String indexOf() Method The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs.

Is NaN function JavaScript?

JavaScript isNaN() Function The isNaN() function determines whether a value is an illegal number (Not-a-Number). This function returns true if the value equates to NaN. Otherwise it returns false.

Where do I run JavaScript code?

To execute JavaScript in a browser you have two options — either put it inside a script element anywhere inside an HTML document, or put it inside an external JavaScript file (with a . js extension) and then reference that file inside the HTML document using an empty script element with a src attribute.

What is JavaScript function statement?

The function statement declares a function. A declared function is “saved for later use”, and will be executed later, when it is invoked (called). In JavaScript, functions are objects, and they have both properties and methods. A function can also be defined using an expression (See Function Definitions).

What is the correct way to declare a function?

A function declaration is made of function keyword, followed by an obligatory function name, a list of parameters in a pair of parenthesis (para1., paramN) and a pair of curly braces {…} that delimits the body code.

What happens when JavaScript function reaches a return statement?

A return statement determines the value the function returns. When control comes across such a statement, it immediately jumps out of the current function and gives the returned value to the code that called the function. A return keyword without an expression after it will cause the function to return undefined .

When talking about JavaScript functions What is a parameter?

The parameters, in a function call, are the function’s arguments. JavaScript arguments are passed by value: The function only gets to know the values, not the argument’s locations. If a function changes an argument’s value, it does not change the parameter’s original value.

Should JavaScript functions always return?

Functions always return a value. In JavaScript, if no return value is specified, the function will return undefined by default. Functions are objects.

What is return function JavaScript?

The return statement is used to return a particular value from the function to the function caller. The function will stop executing when the return statement is called. We can return primitive values (such as Boolean, number, string, etc.) and Object types (such as functions, objects, arrays, etc.)

Can JavaScript function return function?

Functions are the same data as numbers or strings, so functions can be passed to other functions as arguments, as well as returned from functions. We can even define a function inside another function and return it outside. And this is not surprising.

What does JavaScript do?

Here are some basic things JavaScript is used for:

  • Adding interactive behavior to web pages. JavaScript allows users to interact with web pages.
  • Creating web and mobile apps.
  • Building web servers and developing server applications.
  • Game development.

What is the difference between return and console log?

return is a statement that allows a function to output a value back to where it was called. console. log is a function that lets us inspect values for debugging purposes.

What does console log () do?

The console. log() is a function that writes a message to log on the debugging console, such as Webkit or Firebug. In a browser you will not see anything on the screen. It logs a message to a debugging console.

Can we return console log?

console. log() is a function used to print information to the console. return on the other hand is a call to pass some value back up to where the call was made. For instance, let’s say you create a function called square() that takes in a single numeric parameter and returns that value squared.

Does console log return anything?

Return value: It returns the value of the parameter given. JavaScript codes to show the working of this function: 1) Passing a number as an argument: If the number is passed to the function console. log() then the function will display it.

What happens if the return statement has no related expression?

If the return statement does not have an associated expression then it returns an undefined value. Explanation: Void functions does not return a value.

Why would you include a use strict statement in a JavaScript file?

The “use strict” directive was new in ECMAScript version 5. It is not a statement, but a literal expression, ignored by earlier versions of JavaScript. The purpose of “use strict” is to indicate that the code should be executed in “strict mode”. With strict mode, you can not, for example, use undeclared variables.

How do you check logs?

Checking Windows Event Logs

  1. Press ⊞ Win + R on the M-Files server computer.
  2. In the Open text field, type in eventvwr and click OK.
  3. Expand the Windows Logs node.
  4. Select the Application node.
  5. Click Filter Current Log… on the Actions pane in the Application section to list only the entries that are related to M-Files.

How do I view ie logs?

Where do IE11 Logs get stored on the system ?

  1. Open the Internet Options window from the Tools menu.
  2. On the Advanced tab, in the Browsing section, you’ll see Always record developer console messages.

How do I check my console for errors?

Press Command+Option+J (Mac) or Control+Shift+J (Windows, Linux, Chrome OS) to jump straight into the Console panel of Chrome DevTools. Or, navigate to More Tools > Developer Tools from Chrome menu, and click Console tab. The error console will open. If you don’t see any errors try reloading the page.

Why am I getting JavaScript errors?

Syntax errors take place when the JavaScript interpreter fails to execute a syntactically incorrect code. Grammatical mistakes, such as missing parentheses or unmatched brackets, are the major causes of syntax errors in JavaScript.