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d3js Exercice 1 - number formats
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| license: mit |
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| <!DOCTYPE html> | |
| <!-- | |
| L'exemple d3js probablement le moins intimidant du monde. Encore que ? | |
| d3 calcule une fonction de format de nombre à partir d'un descripteur. | |
| La fonction obtenue est appelée avec les données numériques. | |
| La documentation se trouve: | |
| https://github.com/d3/d3-format | |
| --> | |
| <head> | |
| <meta charset="utf-8"> | |
| <!-- on ne charge que le module d3-format --> | |
| <script src="https://d3js.org/d3-format.v1.js"></script> | |
| </head> | |
| <body> | |
| <pre> | |
| <script> | |
| // Le problème de l'affichage des nombres en javascript | |
| for (var i = 0; i < 10; i++) { | |
| document.writeln(0.1 * i); | |
| } | |
| </script> | |
| <hr> | |
| <script> | |
| document.writeln(); | |
| let x = 0.594929759999999; // <-- ICI POUR FAIRE VARIER LA VALEUR | |
| document.writeln('LE BAC A SABLE DES FORMATS DE NOMBRE\n'); | |
| const f = d3.format('.1f'); | |
| document.writeln(x + ' -> ' + f(x)); | |
| document.writeln((1000 * x) + ' -> ' + f(1000*x)); | |
| const s = d3.format('.2s'); | |
| document.writeln(x + ' -> ' + s(x)); | |
| document.writeln((x/1000) + ' -> ' + s(x/1000)); | |
| // Essayer avec e, %, r, d, s | |
| // Lire la documentation https://github.com/d3/d3-format | |
| // et on peut passer en français sans douleur */ | |
| const locale = { | |
| "decimal": ",", | |
| "thousands": ".", | |
| "grouping": [3], | |
| "currency": ["", "\u00a0€"], | |
| "percent": "\u202f%" | |
| }; | |
| d3.formatDefaultLocale(locale); | |
| const r = d3.format('.2s'); | |
| document.writeln(x + ' -> ' + r(x)); | |
| /* | |
| // Ca marche bien aussi avec node, naviguer vers | |
| //https://npm.runkit.com/d3-format et coller le code qui suit | |
| var d3 = require("d3-format") | |
| const f = d3.format('0.3'); | |
| console.log(f(2.56678)); | |
| */ | |
| </script> | |
| </pre> | |
| </body> |
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