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take advantage of global scoping
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| const a = document.getElementById('a'); | |
| const aVal = parseInt(a.value); |
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| const b = document.getElementById('b'); | |
| b.value = aVal + 5; |
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| <html> | |
| <head> | |
| <script src="a.js" defer></script> | |
| <script src="b.js" defer></script> | |
| </head> | |
| <body> | |
| <input id="a" type="text" value="10"> | |
| <input id="b" type="text"> | |
| </body> | |
| </html> |
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