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The window object allows execution of code at specified time intervals. These time intervals are called timing events. The two key methods to use with JavaScript are: setTimeout(function, milliseconds) Executes a function, after waiting a specified number of milliseconds. setInterval(function, milliseconds)
Use if to specify a block of code to be executed, if a specified condition is true. Use else to specify a block of code to be executed, if the same condition is false. Use else if to specify a new condition to test, if the first condition is false.
24 wrz 2021 · You can use Date and get current hour with getHours function. const d = new Date(); // get current date const hour = d.getHours(); // get current hour if (hour < 12) console.log("good morning"); else if (hour < 16) console.log("good afternoon"); else if (hour < 24) console.log("good evening");
21 lip 1983 · function addZero (i) { if (i < 10) {i = "0" + i} return i;} const d = new Date (); let h = addZero (d.getHours ()); let m = addZero (d.getMinutes ()); let s = addZero (d.getSeconds ()); let time = h + ":" + m + ":" + s; Try it Yourself ». JavaScript Dates. JavaScript Date Formats. JavaScript Date Get Methods.
The JavaScript if...else statement is used to execute/skip a block of code based on a condition. Here's a quick example of the if...else statement. You can read the rest of the tutorial if you want to learn about if...else in greater detail.
The greater than (>) operator returns true if the left operand is greater than the right operand, and false otherwise.
Conditional statements control behavior in JavaScript and determine whether or not pieces of code can run. There are multiple different types of conditionals in JavaScript including: “If” statements: where if a condition is true it is used to specify execution for a block of code.
