Hello, world!
JavaScript 可以在很多不同環境裡執行 ( server、browser )。
The “script” tag
Modern markup
External scripts
<script src="/path/to/script.js"></script> //絕對路徑<script src="script.js"></script> //相對路徑<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.2.0/lodash.js"></script> //url<script src="/js/script1.js"></script>
<script src="/js/script2.js"></script>
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