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March 20, 2012 13:20
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Подключение JavaScript на странице
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Подключение внешнего JS</title> | |
| <!-- | |
| Атрибут src указывает путь в файлу с javascript кодом | |
| Атрибут type в настоящее время является необязательным | |
| --> | |
| <script | |
| src="02.first-script.js" | |
| type="text/javascript"></script> | |
| </head> | |
| <body> | |
| <h1>Правильный способ подключения JS на странице</h1> | |
| <!-- | |
| Элемент script может располагаться в любом месте страницы | |
| --> | |
| <script | |
| src="03.second-script.js"></script> | |
| </body> | |
| </html> |
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| /* | |
| Этот сценарий выведет текст в модальное всплывающее окно | |
| */ | |
| alert('Скрипт работает'); |
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| /* | |
| А этот сценарий выведет текст в консоль отладчика | |
| */ | |
| // Заглушка для старых браузеров | |
| if (!window.console || !console.firebug) { | |
| var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"]; | |
| window.console = {}; | |
| for (var i = 0; i < names.length; ++i) { | |
| window.console[names[i]] = function() {} | |
| } | |
| } | |
| console.log("И этот скрипт тоже работает"); |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Встроенный JS</title> | |
| <script> | |
| // JavaScript-код может быть размещён внутри блока script | |
| document.write("Вывод текста прямо в браузер"); | |
| </script> | |
| </head> | |
| <body> | |
| <h1>Допустимый способ подключения JS на странице</h1> | |
| </body> | |
| </html> |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Обработчик события JS</title> | |
| </head> | |
| <body onload="alert('Страница загружена');"> | |
| <h1>Нежелательный способ подключения JS на странице</h1> | |
| </body> | |
| </html> |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Обработчик события JS</title> | |
| </head> | |
| <body> | |
| <h1>Недопустимый способ подключения JS на странице</h1> | |
| <p><a href="javascript:alert('Ну кто так делает, а?');">Давай, щелкай</a></p> | |
| </body> | |
| </html> |
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