Created
June 26, 2019 17:12
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動的に@pageを書き換える例
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| <!DOCTYPE html> | |
| <html lang="ja"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge"> | |
| <style id="style-main"></style> | |
| <title>Document</title> | |
| </head> | |
| <body> | |
| <button id="btn-toggle-print-size"> | |
| Toggle | |
| </button> | |
| <div style="text-align: center; font-size: 6rem;"> | |
| Test | |
| </div> | |
| <script> | |
| const PRINT_SIZE_LANDSCAPE = "landscape"; | |
| const PRINT_SIZE_PORTRAIT = "portrait"; | |
| const setPageSize = (style, size) => { | |
| style.innerHTML = [ | |
| "@page {", | |
| ` size: ${size}`, | |
| "}" | |
| ].join("\n"); | |
| style.dataset.printSize = size; | |
| } | |
| const togglePageSize = (style) => { | |
| if (style.dataset.printSize === PRINT_SIZE_LANDSCAPE) { | |
| setPageSize(style, PRINT_SIZE_PORTRAIT) | |
| } else { | |
| setPageSize(style, PRINT_SIZE_LANDSCAPE); | |
| } | |
| } | |
| document.addEventListener("DOMContentLoaded", () => { | |
| const btn = document.getElementById("btn-toggle-print-size"); | |
| btn.addEventListener("click", () => { | |
| const style = document.getElementById("style-main"); | |
| togglePageSize(style); | |
| }) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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