質問編集履歴
2
fさふぁ
test
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File without changes
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test
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@@ -14,7 +14,7 @@
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border: 'solid 1px #000',
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'background-color':
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'background-color': #ff0000
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}"
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fa
test
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1
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【
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【Nuxt.js】canvasを画像化する際にバックグランドカラーが表示されない【Javascript】
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test
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@@ -3,6 +3,8 @@
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3
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`png`形式にすると背景が透明色で保存され、`jpeg`で保存すると背景色が真っ黒で表示されます。
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5
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```html
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6
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7
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<template>
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<canvas
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@@ -12,13 +14,69 @@
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border: 'solid 1px #000',
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'background-color':
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'background-color': this.selectedTemplate.background,
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}"
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>
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</canvas>
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</template>
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//描画処理
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<script>
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export default {
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mounted() {
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this.ctx = document.getElementById('preview').getContext('2d')
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this.drawCreative()
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},
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methods: {
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drawCreative() {
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this.ctx.canvas.width = 500
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this.ctx.canvas.height = 500
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this.ctx.beginPath()
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this.ctx.clearRect(0, 0, 500, 500)
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this.ctx.fill()
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},
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downloadCanvas() {
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const canvasImage = document.getElementById('preview')
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const link = document.createElement('a')
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link.href = canvasImage.toDataURL('image/png')
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link.download = 'hoge.png'
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68
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link.click()
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},
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},
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}
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</script>
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79
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80
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```
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82
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