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One tip about arrow function, if use this without { ... }, the value of expression is automatic returned without need return statement, with { ... } around expression is necessary explicit return. Example:
{ ... }
return
const add1 = (a, b) => a + b; console.log(add1(10, 5)); // print 15 const add2 = (a, b) => { return a + b; }; console.log(add2(10, 5)); // print 15 const add3 = (a, b) => { a + b; }; console.log(add3(10, 5)); // print undefined
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One tip about arrow function, if use this without
{ ... }, the value of expression is automatic returned without needreturnstatement, with{ ... }around expression is necessary explicitreturn. Example: