Simple scalable SVG graph with a Cartesian coordinate system

Question

I am completely new to SVG, so please bear with me. I read a lot of articles on this subject, and everyone points to solutions like d3.js, which, in my opinion, is a difficult way for the simple task that I have.

I need to make a graph with a Cartesian coordinate system, where (0,0) is in the lower left corner. It should have width, height and data inside expressed as a percentage, so everything scales with the page.

So here is my code (to make things simple, there is only part of the graph):

<style>
 .grid {stroke: white; stroke-width: 1; stroke-dasharray: 1 2}
 .label{font-family: courier new; fill: white; font-size: 14px}
 .data {stroke: white; stroke-width: 1}
</style>

<svg width="100%" height="100%">
 <g class="x grid">
  <line x1="0%"   x2="0%"   y1="80%" y2="100%"></line>
  <line x1="10%"  x2="10%"  y1="80%" y2="100%"></line>
  <line x1="20%"  x2="20%"  y1="80%" y2="100%"></line>
 </g>
 <g class="y grid">
  <line x1="0%" x2="20%" y1="80%"  y2="80%" ></line>
  <line x1="0%" x2="20%" y1="90%"  y2="90%" ></line>
  <line x1="0%" x2="20%" y1="100%" y2="100%"></line>
 </g>
 <g class="x label">
  <text x="10%"  y="100%"> 1 minute </text>
  <text x="20%"  y="100%"> 2 minutes</text>
 </g>
 <g class="y label">
  <text x="0%" y="80%"> 20% </text>
  <text x="0%" y="90%"> 10% </text>
 </g>
 <g class="data">
  <line x1="0%"  x2="10%"  y1="85%"  y2="92%"  ></line>
  <line x1="10%" x2="20%"  y1="92%"  y2="88%"  ></line>
 </g>
</svg>

polygon path , , . - viewbox , , . (0,0) , CGI , . transform="translate(0,100) scale(1,-1)", . transform="rotate(270)", , ...

, - , , ?

Answer 1

viewBox, , , . viewBox - . viewBox , . .

<svg width="100%" height="100%" viewBox="0 0 500 500">
  <g id="cartesian" transform="translate(0,500) scale(1,-1)">
    <g class="data">
      <line x1="0%"  y1="75%" x2="50%"  y2="40%" ></line>
      <line x1="50%" y1="40%" x2="100%" y2="60%"></line>
    </g>
  </g>
</svg>

, . , , , :

<svg width="100%" height="100%" viewBox="0 0 500 500">
  <g id="cartesian" transform="translate(0,500) scale(1,-1)">
    <g class="data">
      <line x1="0%"  y1="75%" x2="50%"  y2="40%" ></line>
      <line x1="50%" y1="40%" x2="100%" y2="60%"></line>
    </g>
    <g class="y label">
      <text x="0%" y="50%"> 10% </text>
      <text x="0%" y="90%"> 20% </text>
    </g>
  </g>
</svg>

, , .

<svg width="100%" height="100%" viewBox="0 0 500 500">
  <g id="cartesian" transform="translate(0,500) scale(1,-1)">
    <g class="data">
      <line x1="0%"  y1="75%" x2="50%"  y2="40%" ></line>
      <line x1="50%" y1="40%" x2="100%" y2="60%"></line>
    </g>
    <g class="y label">
      <text x="0%" y="50%" font-size="16"
            transform="translate(0,500) scale(1,-1)"> 10% </text>
      <text x="0%" y="90%" font-size="16"
            transform="translate(0,900) scale(1,-1)"> 20% </text>
    </g>
  </g>
</svg>

, , . <text>, .

, <defs> <use>. , .

<svg width="100%" height="100%" viewBox="0 0 500 500">
  <defs>
    <text id="label1" font-size="16" transform="scale(1,-1)"> 10% </text>
    <text id="label2" font-size="16" transform="scale(1,-1)"> 20% </text>
  </defs>
  <g id="cartesian" transform="translate(0,500) scale(1,-1)">
    <g class="data">
      <line x1="0%"  y1="75%" x2="50%"  y2="40%" ></line>
      <line x1="50%" y1="40%" x2="100%" y2="60%"></line>
    </g>
    <g class="y label">
        <use xlink:href="#label1" x="0%" y="50%"/>
        <use xlink:href="#label2" x="0%" y="90%"/>
    </g>
  </g>
</svg>