前言
记录过年期间的学习情况,基本提升自己的知识范围。
接下来,主要学习基础内容如下:
1.canvas基本使用,
2.svg基本使用,
3.zrzrender基本使用,
4.d3基本使用
canvas基本使用
<canvas id="canvas" width="800" height="800"></canvas>
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
ctx.fillStyle = "red";
ctx.fillRect(0, 0, 50, 50);
ctx.beginPath();
ctx.lineWidth = 1;
ctx.strokeStyle = "blue";
ctx.moveTo(100, 100);
ctx.lineTo(250, 75);
ctx.lineTo(300, 100);
ctx.stroke();
ctx.beginPath();
ctx.lineWidth = 2;
ctx.strokeStyle = "green";
ctx.fillStyle = "red";
ctx.arc(200, 200, 50, 0, 2 * Math.PI);
ctx.stroke();
ctx.fill();
ctx.beginPath();
ctx.lineWidth = 1;
ctx.strokeStyle = "blue";
ctx.moveTo(300, 300);
ctx.lineTo(301, 301);
ctx.stroke();
svgj基本使用
<svg width="800" height="800">
<rect width="50" height="50" style="fill: red; stroke-width: 1px"></rect>
<line
x1="100"
y1="100"
x2="250"
y2="75"
style="stroke: blue; stroke-width: 1"
></line>
<line
x1="250"
y1="75"
x2="300"
y2="100"
style="stroke: blue; stroke-width: 1"
></line>
<circle
cx="200"
cy="200"
r="50"
stroke="green"
stroke-width="2"
fill="red"
></circle>
<line
x1="300"
y1="300"
x2="301"
y2="301"
style="stroke: red; stroke-width: 1"
></line>
</svg>
zrender基本使用
<div id="container" style="width: 800; height: 800"></div>
const zr = zrender.init(document.getElementById("container"));
const rect = new zrender.Rect({
shape: {
x: 0,
y: 0,
width: 50,
height: 50,
},
style: {
fill: "red",
lineWidth: 0,
},
});
const line = new zrender.Polyline({
shape: {
points: [
[100, 100],
[250, 75],
[300, 100],
],
},
style: {
stroke: "blue",
lineWidth: 1,
},
});
const circle = new zrender.Circle({
shape: {
cx: 200,
cy: 200,
r: 50,
},
style: {
fill: "red",
stroke: "green",
lineWidth: 2,
},
});
const point = new zrender.Polyline({
shape: {
point: [
[300, 300],
[301, 301],
],
},
style: {
stroke: "red",
lineWidth: 1,
},
});
zr.add(rect);
zr.add(line);
zr.add(circle);
zr.add(point);
d3基本使用
<p>VUE</p>
<p>react</p>
<p>Agular</p>
<button id="datum">datum</button>
<button id="data">data</button>
var body = d3.select("body");
var p = body.selectAll("p");
function doDatum() {
var str = "ddkjdkld";
p.datum(str);
pl.text(function (d, i) {
return `${d}-${i}`;
});
}
function doData() {
var dataset = ["vue", "rect", "Agular"];
p.data(dataset).text(function (d, i) {
return `${d}-${i}`;
});
}
document.getElementById("datum").addEventListener("click", function (e) {
doDatum();
});
document.getElementById("data").addEventListener("click", function (e) {
doData();
});