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JavaScript -Short-circuiting in boolean
Following is the code for short circuiting in boolean −
Example
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Document</title> <style> body { font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif; } .result { font-size: 20px; font-weight: 500; color: blueviolet; } </style> </head> <body> <h1>Short-circuit Boolean</h1> <div class="result"></div> <br /> <button class="Btn">&& short circuit evaluation</button> <button class="Btn">|| short circuit evaluation</button> <h3>Click on the above button to see the the short circuit evaluation</h3> <script> let resEle = document.querySelector(".result"); let BtnEle = document.querySelectorAll(".Btn"); function retTrue() { resEle.innerHTML += "True <br>"; return true; } function retFalse() { resEle.innerHTML += "False <br>"; return false; } BtnEle[0].addEventListener("click", () => { resEle.innerHTML = "&& evaluation<br>"; retFalse() && retTrue(); }); BtnEle[1].addEventListener("click", () => { resEle.innerHTML = "|| evaluation <br>"; retTrue() || retFalse(); }); </script> </body> </html> Output
On clicking the ‘&& short circuit evaluation’ button −
On clicking the ‘|| short circuit evaluation’ button −
Updated on: 2020-07-18T08:12:12+05:30
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