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JavaScript 2019 新特性
tryjs_object_fromentries
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<!DOCTYPE html> <html> <body> <h1>JavaScript Objects</h1> <h2>The Object.fromEntries() Method</h2> <p>The number of pears are:</p> <p id="demo"></p> <script> const fruits = [ ["apples", 300], ["pears", 900], ["bananas", 500] ]; const myObj = Object.fromEntries(fruits); document.getElementById("demo").innerHTML = myObj.pears; </script> </body> </html>