I have a set of arrays to set the start position, weidth and name of some chart elements in a SVG. What I haven't been able to achieve is setting the colour of each of those elements using HEX values from an array called chart_color.
Currently you'll see I've set the value of fill to green. What I tried and failed with is fill: chart_color[num].
<!DOCTYPE html>
<body>
<svg id="mysvg" width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<text x="50" y="60" fill="black"
font-family="Arial, Helvetica, sans-serif"
font-size="28">Revenue and Expenses</text>
<line x1="150" y1="80" x2="150" y2="320"
style="stroke:rgb(155, 144, 144);stroke-width:5" />
<script type="application/ecmascript"> <![CDATA[
var mysvg = document.getElementById("mysvg");
var chart_start = [152, 84, 152]
var chart_width = [100,64,36]
var chart_names = ["Revenue", "Expenses","Profit"]
var chart_color = ["#28CE6D","#DF3456","#4DC7EC"]
var num = 3;
while (num-- > 0)
{
var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
rect.setAttribute("x", chart_start[num]);
rect.setAttribute("y", [num] * 70 + 100);
rect.setAttribute("width", chart_width[num]);
rect.setAttribute("height", "50");
rect.setAttribute("style", "fill:green;stroke:black;stroke-width:0;opacity:1");
mysvg.appendChild(rect);
}
]]></script>
</svg>
</body>
</html>
With style attributes you can actually assign them a value without using the setAttribute function:
rect.style.fill = chart_color[num]
But use this method consistently so that you don't override the style attribute, like setting color to "red" then setting style to "width:100px".
You just need to get the index (num) of the chart_color array and apply that as a variable within in your style declaration (breaking out of the string).
Note that you are also setting the border to stroke: black - but hte stroke width to 0 - So it can be seen I have amended that to stroke-width: 1 so that the border on each shows up.
<!DOCTYPE html>
<body>
<svg id="mysvg" width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<text x="50" y="60" fill="black"
font-family="Arial, Helvetica, sans-serif"
font-size="28">Revenue and Expenses</text>
<line x1="150" y1="80" x2="150" y2="320"
style="stroke:rgb(155, 144, 144);stroke-width:5" />
<script type="application/ecmascript"> <![CDATA[
var mysvg = document.getElementById("mysvg");
var chart_start = [152, 84, 152]
var chart_width = [100,64,36]
var chart_names = ["Revenue", "Expenses","Profit"]
var chart_color = ["#28CE6D","#DF3456","#4DC7EC"]
var num = 3;
while (num-- > 0)
{
var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
rect.setAttribute("x", chart_start[num]);
rect.setAttribute("y", [num] * 70 + 100);
rect.setAttribute("width", chart_width[num]);
rect.setAttribute("height", "50");
rect.setAttribute("style", "fill:" + chart_color[num] + ";stroke:black;stroke-width:1;opacity:1");
mysvg.appendChild(rect);
}
]]></script>
</svg>
</body>
</html>
Related
I'm trying to add a text element to my dynamically created SVG chart so that I can have labels generated but can't make it work.
There is a WHILE loop for adding boxes for a chart. I use the same while loop for text labels and it isn't working, it makes the boxes also fail. When I remove text labels, it works perfectly.
Your help much appreciated.
<svg id="mysvg" width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<text x="50" y="60" fill="black"
font-family="Arial, Helvetica, sans-serif"
font-size="28">Revenue and Expenses</text>
<line x1="150" y1="80" x2="150" y2="320"
style="stroke:rgb(155, 144, 144);stroke-width:5" />
<script type="application/ecmascript">
<![CDATA[
var mysvg = document.getElementById("mysvg");
var chartStart = [152, 84, 152]
var chartWidth = [100,64,36]
var chartNames = ["Revenue", "Expenses","Profit"]
var chartColor = ["#28CE6D","#DF3456","#4DC7EC"]
var num = chartNames.length;
while (num-- > 0)
{
var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
rect.setAttribute("x", chartStart[num]);
rect.setAttribute("y", [num] * 70 + 100);
rect.setAttribute("width", chartWidth[num]);
rect.setAttribute("height", "50");
rect.setAttribute("style", "fill:" + chartColor[num] + ";stroke:black;stroke-width:0;opacity:1");
var text = document.createElementNS("http://www.w3.org/2000/svg", "text");
text.setAttribute("x", "280");
text.setAttribute("y", [num] *70 + 130);
text.setAttribute("style", "fill:black");
text.setAttribute("font-family", "Arial, Helvetica, sans-serif");
text.setAttribute("font-size","18");
text.setAttribute("textContent", chartNames[num]);
mysvg.appendChild(rect);
mysvg.appendChild(text);
}
]]>
</script>
</svg>
Ok, found my own solution, I had not created a text node to append to the value for text element. Fixed it using the below. I'm sharing so that this question doesn't go unanswered. Thanks
<!DOCTYPE html>
<body>
<svg id="mysvg" width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<text x="50" y="60" fill="black"
font-family="Arial, Helvetica, sans-serif"
font-size="28">Revenue and Expenses</text>
<line x1="150" y1="80" x2="150" y2="320"
style="stroke:rgb(155, 144, 144);stroke-width:5" />
<script type="application/ecmascript">
<![CDATA[
var mysvg = document.getElementById("mysvg");
var chartStart = [152, 84, 152]
var chartWidth = [100,64,36]
var chartNames = ["Revenue", "Expenses","Profit"]
var chartColor = ["#28CE6D","#DF3456","#4DC7EC"]
var num = chartNames.length;
while (num-- > 0)
{
var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
rect.setAttribute("x", chartStart[num]);
rect.setAttribute("y", [num] * 70 + 100);
rect.setAttribute("width", chartWidth[num]);
rect.setAttribute("height", "50");
rect.setAttribute("style", "fill:" + chartColor[num] + ";stroke:black;stroke-width:0;opacity:1");
var label = document.createElementNS("http://www.w3.org/2000/svg", "text");
label.setAttribute("x", "280");
label.setAttribute("y", [num] *70 + 130);
label.setAttribute("style", "fill:black");
label.setAttribute("font-family", "Arial, Helvetica, sans-serif");
label.setAttribute("font-size","18");
var txt = document.createTextNode(chartNames[num]);
label.appendChild(txt);
mysvg.appendChild(rect);
mysvg.appendChild(label);
}
]]>
</script>
</svg>
</body>
</html>
I am using vanilla javascript to navigate the pages of a comic book. However, I need to setup a condition that checks if the points in the current polygon intersects with the points in the next polygon. If true, I want the viewBox to animate from the current points to the next points, if false let nothing happen (use the default fade transition).
Here is a section of my code
var DELAY = 400;
function nextArea() {
if (isFirstPage() || areaIndex >= areas.length - 1) {
changePage(true);
changeArea();
} else {
fade();
areaIndex++;
setTimeout(changeArea, DELAY);
}
}
function prevArea() {
if (isLastPage() || areaIndex <= 0) {
changePage(false);
changeArea();
} else {
fade();
areaIndex--;
setTimeout(changeArea, DELAY);
}
}
function changeArea() {
if (isFirstPage() || isLastPage()) {
return;
}
var activeArea = areas[areaIndex];
var points = activeArea.getAttribute('points').split(' ');
var xy1 = points[0].split(',');
var xy2 = points[1].split(',');
var xy3 = points[2].split(',');
var box = [xy1[0], xy1[1], xy2[0] - xy1[0], xy3[1] - xy2[1]];
activePage.classList.remove('fade');
activePage.setAttribute('viewBox', box.join(' '));
activeRect = rects[pageIndex - 1];
activeRect.setAttribute('x', xy1[0]);
activeRect.setAttribute('y', xy1[1]);
}
My code repository is here: https://github.com/cnario/svg-carousel
Here is what I have thus far: https://cnario.github.io/svg-carousel/
Here is how I expect it to act: https://read.marvel.com/#book/41323
I suppose this is what you may need: a way to transition the viewBox from one value to another so that every time you have only one part of the svg in the viewBox.
let BB = {};
BB.tomato = tomato.getBBox();
BB.skyblue = skyblue.getBBox();
BB.gold = gold.getBBox();
let radios = document.querySelectorAll("#controls input");
radios.forEach(r =>{
let color = r.dataset.color;
let bb = BB[color];
r.addEventListener("change",()=>{
svg.setAttributeNS(null,"viewBox", `${bb.x} ${bb.y} ${bb.width} ${bb.height}`)
svg.style.height = `${bb.height * 300 / bb.width}px`;
})
})
svg {
width: 300px;
border: 1px solid;
height: 600px;
transition: height 1s;
}
<p id="controls">
<label>tomato: <input type="radio" name="selector" data-color="tomato" /></label>
<label>skyblue: <input type="radio" name="selector" data-color="skyblue" /></label>
<label>gold: <input type="radio" name="selector" data-color="gold" /></label>
</p>
<svg id="svg" viewBox="0 0 100 200">
<g id="tomato">
<circle cx="35" cy="70" r="25" fill="tomato" />
</g>
<g id="skyblue">
<ellipse cx="75" cy="160" rx="15" ry="35" fill="skyblue" />
</g>
<g id="gold">
<polygon fill="gold" points="75,15 60,30 90,30" />
</g>
</svg>
I need to place some html elements over my svg path. How can i do that ?
I looked up for foreignObject but it only allows for whole svg what about the path sections ?
Here is my svg code
<svg id="svg" width="50%" height="50%" fill="none" stroke="#000000" stroke-linejoin="round" enable_background="new 0 0 1000 589" pretty_print="False" version="1.1" viewBox="0 0 271.87 232.08" xmlns="http://www.w3.org/2000/svg">
<g fill="#f9f9f9" fill-rule="evenodd" stroke-width=".97063">
<path d="m109.29 15.045 0.2913-7.5709-3.106-0.0971-21.451-0.97063-21.548-1.3589-48.92-4.2708-3.009-0.29119-0.38825 3.4943-7.2797 75.127-0.67944 7.0856-2.7178 28.634 0.38826 0.0971 13.395 1.2618 1.2618-6.7944 2.4266-1.9413 27.178 2.4266h0.19413l-2.4266-4.7561 12.327 0.87357 30.769 1.7471 19.218 0.87357 3.3002-91.045 0.67944 0.0971 0.0971-2.6207z" data-id="NM" data-name="New Mexico"/>
<path d="m246.35 13.201-0.19413-2.6207-0.0971-2.5236-0.19413-2.5236-3.6884 0.29119-37.563 1.7471-52.705 0.77651-22.519-0.29119-4.1737-0.0971h-1.553l-6.115-0.19413-1.9413-0.0971-4.0766-0.0971-1.9413-0.0971-0.2913 7.5709-0.0971 2.6207h0.58238l23.489 0.58238 24.848 0.29119 0.29119 33.196 1.7471 5.8238 3.8825 3.6884 4.1737 0.19413 0.87356-1.7471 5.7267 5.2414 7.4739 0.7765 1.3589 1.553 2.7178-1.2618 6.7944 3.2031v1.8442l2.5236-0.0971 2.6207-2.2324 4.8532 3.106 4.562 1.6501 3.106-4.2708 9.9004 4.659 3.6884-3.009 3.009-1.1648 2.4266 0.58238 9.1239-2.6207 4.8532 2.0383 4.3678 2.8148 3.7855 0.67944h0.0971l-0.0971-4.3678-1.0677-26.401-0.0971-4.3678-3.7855-19.607-0.58238-2.7178-0.0971-2.5236z" data-id="OK" data-name="Oklahoma"/>
<path d="m210.82 227.22-4.659-17.568v3.3002zm-1.0677-30.866-3.3002 6.212-0.38825 2.0383zm2.6207-4.562 3.106-4.0767-2.2324 1.3589zm10.968-9.9004-7.2797 3.7855 2.0383-0.38825zm0.97063-1.3589 2.0383-1.6501-0.7765 0.19413zm-115.12-162.87-0.67944-0.0971-3.3002 91.045-19.218-0.87357-30.769-1.7471-12.327-0.87357 2.4266 4.7561 10.58 10.58 6.0179 7.0856 7.9592 5.9208 5.6297 10.289 2.1354 10.774 4.562 3.009 3.5913 3.9796 5.1443 1.8442 7.4739 4.7561 3.3972 1.2618 4.659-4.659 1.456-4.9502 2.4266-4.7561 7.5709-3.009 2.9119 1.4559 8.4445 0.67945 7.668 4.7561 5.2414 0.97063-1.456 2.7178 3.009 1.9413 2.8148 3.3972 0.58238 3.5913 1.8442 2.4266 4.2708 10.289 4.2708 3.5913 3.3002 5.4355 4.1737 4.2708 1.8442 0.58238 1.553 11.065 4.562 2.5236 0.19412 3.4943 1.1648-0.29119 7.9592 9.7063 3.9796 0.87357 5.0473 3.009h7.765l5.6297 3.106 6.6974-1.4559-3.009-2.8148-2.7178-8.1533-1.0677-7.0856-1.553-2.3295 0.67944-4.7561-2.0383-0.19413-2.7178-4.4649 3.106 3.3002 3.5913-1.2618 1.9413-5.1444-3.8825-5.2414 5.8238 0.67944 2.7178-4.1737-0.38825-1.456 2.4266-3.2031-0.58238 2.8148 2.7178-2.1354-1.0677-3.7855 3.4943 1.8442 4.4649-2.5236-4.3678-4.562 2.7178 1.0677 5.0473 0.29119 6.6003-1.456 7.3768-4.9502 4.4649-3.6884 0.67944-2.7178 2.7178-2.8148-1.456-4.659 0.29119-2.9119 4.8532-2.1354-0.38826 5.1444h2.9119l-3.2031 2.7178 12.909-6.7944 2.1354-0.0971 1.3589-6.212h0.38826l1.4559-3.5913 0.67944-11.065 0.87357-4.4649-2.5236-7.9592-3.106-5.4355-0.0971-2.6207-3.2031-4.4649-1.9413-18.733-0.0971-2.3295-0.19413-2.4266-0.58238-8.5416-5.8238 0.19413-1.456-1.553-0.29119-0.0971h-0.0971l-3.7855-0.67944-4.3678-2.8148-4.8532-2.0383-9.1239 2.6207-2.4266-0.58238-3.009 1.1648-3.6884 3.009-9.9004-4.659-3.106 4.2708-4.562-1.6501-4.8532-3.106-2.6207 2.2324-2.5236 0.0971v-1.8442l-6.7944-3.2031-2.7178 1.2618-1.3589-1.553-7.4739-0.7765-5.7267-5.2414-0.87356 1.7471-4.1737-0.19413-3.8825-3.6884-1.7471-5.8238-0.29119-33.196-24.848-0.29119-23.489-0.58238h-0.58238z" data-id="TX" data-name="Texas"/>
</g>
</svg>
You need to find the center of a path in pixels in a resizable svg element. For this you need:
to find the center of a path in svg units
convert the svg units in pixels
repeat on resize
Please read the comments on my code.
In my code the div #label is just a point. If you need to add text to the div you'll need to take in account the width and the height of the div.
// the values of the svg viewBox
svgVB = { x: 0, y: 0, w: 271.87, h: 232.08 };
//the bounding box for the path id="NM"
let BB = NM.getBBox();
//the center of the path in svg units
let center = {};
center.x = BB.x + BB.width / 2;
center.y = BB.y + BB.height / 2;
//the center of the path in html units
let htmlCenter = {};
// a function to get the position of the div
function positionDiv() {
//first get the size and the position of the svg element
let SVGClientRect = svg.getBoundingClientRect();
//calculate the htmlCenter x
htmlCenter.x = map(
center.x,
svgVB.x,
svgVB.w,
SVGClientRect.x,
SVGClientRect.x + SVGClientRect.width
);
//calculate the htmlCenter y
htmlCenter.y = map(
center.y,
svgVB.y,
svgVB.h,
SVGClientRect.y,
SVGClientRect.y + SVGClientRect.height
);
// set the styles for the label
label.style.left = htmlCenter.x + "px";
label.style.top = htmlCenter.y + "px";
}
//call the positionDiv function
positionDiv();
//call the positionDiv function on resize
window.setTimeout(function() {
positionDiv();
window.addEventListener("resize", positionDiv, false);
}, 15);
function map(n, a, b, _a, _b) {
let d = b - a;
let _d = _b - _a;
let u = _d / d;
return _a + n * u;
}
svg {
border: 1px solid;
}
#label {
width: 5px;
height: 5px;
border-radius: 50%;
background: red;
position: absolute;
}
<svg id="svg" width="50%" height="50%" fill="none" stroke="#000000" stroke-linejoin="round" enable_background="new 0 0 1000 589" pretty_print="False" version="1.1" viewBox="0 0 271.87 232.08" xmlns="http://www.w3.org/2000/svg">
<g fill="#f9f9f9" fill-rule="evenodd" stroke-width=".97063">
<path d="m109.29 15.045 0.2913-7.5709-3.106-0.0971-21.451-0.97063-21.548-1.3589-48.92-4.2708-3.009-0.29119-0.38825 3.4943-7.2797 75.127-0.67944 7.0856-2.7178 28.634 0.38826 0.0971 13.395 1.2618 1.2618-6.7944 2.4266-1.9413 27.178 2.4266h0.19413l-2.4266-4.7561 12.327 0.87357 30.769 1.7471 19.218 0.87357 3.3002-91.045 0.67944 0.0971 0.0971-2.6207z" id="NM" data-name="New Mexico"/>
<path d="m246.35 13.201-0.19413-2.6207-0.0971-2.5236-0.19413-2.5236-3.6884 0.29119-37.563 1.7471-52.705 0.77651-22.519-0.29119-4.1737-0.0971h-1.553l-6.115-0.19413-1.9413-0.0971-4.0766-0.0971-1.9413-0.0971-0.2913 7.5709-0.0971 2.6207h0.58238l23.489 0.58238 24.848 0.29119 0.29119 33.196 1.7471 5.8238 3.8825 3.6884 4.1737 0.19413 0.87356-1.7471 5.7267 5.2414 7.4739 0.7765 1.3589 1.553 2.7178-1.2618 6.7944 3.2031v1.8442l2.5236-0.0971 2.6207-2.2324 4.8532 3.106 4.562 1.6501 3.106-4.2708 9.9004 4.659 3.6884-3.009 3.009-1.1648 2.4266 0.58238 9.1239-2.6207 4.8532 2.0383 4.3678 2.8148 3.7855 0.67944h0.0971l-0.0971-4.3678-1.0677-26.401-0.0971-4.3678-3.7855-19.607-0.58238-2.7178-0.0971-2.5236z" id="OK" data-name="Oklahoma"/>
<path d="m210.82 227.22-4.659-17.568v3.3002zm-1.0677-30.866-3.3002 6.212-0.38825 2.0383zm2.6207-4.562 3.106-4.0767-2.2324 1.3589zm10.968-9.9004-7.2797 3.7855 2.0383-0.38825zm0.97063-1.3589 2.0383-1.6501-0.7765 0.19413zm-115.12-162.87-0.67944-0.0971-3.3002 91.045-19.218-0.87357-30.769-1.7471-12.327-0.87357 2.4266 4.7561 10.58 10.58 6.0179 7.0856 7.9592 5.9208 5.6297 10.289 2.1354 10.774 4.562 3.009 3.5913 3.9796 5.1443 1.8442 7.4739 4.7561 3.3972 1.2618 4.659-4.659 1.456-4.9502 2.4266-4.7561 7.5709-3.009 2.9119 1.4559 8.4445 0.67945 7.668 4.7561 5.2414 0.97063-1.456 2.7178 3.009 1.9413 2.8148 3.3972 0.58238 3.5913 1.8442 2.4266 4.2708 10.289 4.2708 3.5913 3.3002 5.4355 4.1737 4.2708 1.8442 0.58238 1.553 11.065 4.562 2.5236 0.19412 3.4943 1.1648-0.29119 7.9592 9.7063 3.9796 0.87357 5.0473 3.009h7.765l5.6297 3.106 6.6974-1.4559-3.009-2.8148-2.7178-8.1533-1.0677-7.0856-1.553-2.3295 0.67944-4.7561-2.0383-0.19413-2.7178-4.4649 3.106 3.3002 3.5913-1.2618 1.9413-5.1444-3.8825-5.2414 5.8238 0.67944 2.7178-4.1737-0.38825-1.456 2.4266-3.2031-0.58238 2.8148 2.7178-2.1354-1.0677-3.7855 3.4943 1.8442 4.4649-2.5236-4.3678-4.562 2.7178 1.0677 5.0473 0.29119 6.6003-1.456 7.3768-4.9502 4.4649-3.6884 0.67944-2.7178 2.7178-2.8148-1.456-4.659 0.29119-2.9119 4.8532-2.1354-0.38826 5.1444h2.9119l-3.2031 2.7178 12.909-6.7944 2.1354-0.0971 1.3589-6.212h0.38826l1.4559-3.5913 0.67944-11.065 0.87357-4.4649-2.5236-7.9592-3.106-5.4355-0.0971-2.6207-3.2031-4.4649-1.9413-18.733-0.0971-2.3295-0.19413-2.4266-0.58238-8.5416-5.8238 0.19413-1.456-1.553-0.29119-0.0971h-0.0971l-3.7855-0.67944-4.3678-2.8148-4.8532-2.0383-9.1239 2.6207-2.4266-0.58238-3.009 1.1648-3.6884 3.009-9.9004-4.659-3.106 4.2708-4.562-1.6501-4.8532-3.106-2.6207 2.2324-2.5236 0.0971v-1.8442l-6.7944-3.2031-2.7178 1.2618-1.3589-1.553-7.4739-0.7765-5.7267-5.2414-0.87356 1.7471-4.1737-0.19413-3.8825-3.6884-1.7471-5.8238-0.29119-33.196-24.848-0.29119-23.489-0.58238h-0.58238z" id="TX" data-name="Texas"/>
</g>
</svg>
<div id="label"></div>
You need to add an id to your path
<path id="my-text" .......... />
aftet that, inside your svg tags put:
<text>
<textPath xlink:href="#text">text on a path</textPath>
</text>
you use the same id you used for that path in the href=""
Hope this helps!
this article also may help you out! https://vanseodesign.com/web-design/svg-text-on-a-path-part-1/
for putting elements in your svg:
The only way i found was using <foreignObject>
example:
<svg>
....
....
<foreignObject>
<div> your content</div>
</foreignObject>
</svg>
https://developer.mozilla.org/en-US/docs/Web/SVG/Element/foreignObject this article can you more about that. There are ways yo position with x and y attributes.
HTML:
<div>
<svg class="velveti-grid-point" width="100" height="100" style="height: 120px; width: 625px;">
<circle class="myPoint" cx="500" cy="105" r="5" fill="#80E1EE" />
</svg>
<div class="theContainer">bg-color</div>
</div>
CSS:
.myPoint:hover + .theContainer {
background-color: black;
}
Problem: When i am hovering on the blue svg circle the background-color should be displayed on the text, but with svg it doesn't work. What is the problem? what do i need to do?
The demo: http://jsfiddle.net/wy6y66ox/
This has nothing to do with SVG per se.
+ is referred to as an adjacent selector. It will select only the element that is immediately preceded by the former element.
Because .myPoint is not a sibling of .theContainer your selector will not work.
You would need javascript in this instance.
Paulie_D is right.You have to use Javascript.
HTML
<div>
<svg class="velveti-grid-point" width="100" height="100" style="height: 120px; width: 625px;">
<circle id="svgid" class="myPoint" cx="500" cy="105" r="5" fill="#80E1EE" />
</svg>
<div id="divcolor" class="theContainer">bg-color</div>
</div>
JS
var svg = document.getElementById( 'svgid' );
var div = document.getElementById( 'divcolor' );
svg.onmouseover = function() {
div.style.backgroundColor = 'blue';
};
svg.onmouseout = function() {
div.style.backgroundColor = 'transparent';
};
Demo Here
I can get this working successfully within the html body, example...
<div id="myContainer" style="float: left; background-color: Blue; height: 100px;
width: 100px;">
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="100%">
<defs>
<lineargradient id="myLinearGradient" x1="0%" x2="0%" y1="0%" y2="100%">
<stop id="start" offset="50%" style="stop-color: White; stop-opacity: 1" />
<stop id="stop" offset="60%" style="stop-color: #99cd9f; stop-opacity: 1" />
</lineargradient>
</defs>
<circle cx="50px" cy="50px" r="50px" fill="url(#myLinearGradient)" />
</svg>
</div>
However, I need to create this dynamically using javascript. Creating just the circle works fine, it's when I point the circle's Fill to the lineargradient it fails - I just get a black circle.
I think I'm not setting the stop 'style' attribute correctly. I have tried an alternative way to no avail, see below...
I'm using Chrome, and thanks in advance!
Within the body tages:
<body>
<div style="float: left; background-color: Blue; height: 100px;
width: 100px;">
<svg id="Svg1" xmlns="http://www.w3.org/2000/svg">
<defs id="mydefs">
</defs>
</svg>
</div>
</body>
My script:
<script>
// lineargradient
var myLinearGradient = document.createElementNS("http://www.w3.org/2000/svg", "lineargradient");
myLinearGradient.setAttribute("id", "myLGID");
myLinearGradient.setAttribute("x1", "0%");
myLinearGradient.setAttribute("x2", "0%");
myLinearGradient.setAttribute("y1", "0%");
myLinearGradient.setAttribute("y2", "100%");
document.getElementById("mydefs").appendChild(myLinearGradient);
//stops
var stop1 = document.createElementNS("http://www.w3.org/2000/svg", "stop");
stop1.setAttribute("id", "myStop1");
stop1.setAttribute("offset", "70%");
//stop1.setAttribute("style", "stop-color: White; stop-opacity: 1");
stop1.setAttribute("stop-color", "White");
document.getElementById("mydefs").appendChild(stop1);
var stop2 = document.createElementNS("http://www.w3.org/2000/svg", "stop");
stop2.setAttribute("id", "myStop2");
stop2.setAttribute("offset", "80%");
//stop2.setAttribute("style", "stop-color: #99cd9f; stop-opacity: 1");
stop2.setAttribute("stop-color", "#99cd9f");
document.getElementById("mydefs").appendChild(stop2);
// Circle
var myCircle = document.createElementNS("http://www.w3.org/2000/svg", "circle");
myCircle.setAttribute("id", "idCircle");
myCircle.setAttribute("cx", "50px");
myCircle.setAttribute("cy", "50px");
myCircle.setAttribute("r", "50px");
myCircle.setAttribute("fill", "url(#myLGID)");
document.getElementById("Svg1").appendChild(myCircle);
</script>
Two things:
The element name for linear gradients is linearGradient, not lineargradient.
You have to append the stops to the linearGradient element, not the defs element.
See this codepen for an MIT-licensed example:
// Store the SVG namespace for easy reuse.
var svgns = 'http://www.w3.org/2000/svg';
// Create <svg>, <defs>, <linearGradient> and <rect> elements using createElementNS to apply the SVG namespace.
// (https://developer.mozilla.org/en-US/docs/Web/API/Document/createElementNS)
var svg = document.createElementNS(svgns, 'svg');
var defs = document.createElementNS(svgns, 'defs');
var gradient = document.createElementNS(svgns, 'linearGradient');
var rect = document.createElementNS(svgns, 'rect');
// Store an array of stop information for the <linearGradient>
var stops = [
{
"color": "#2121E5",
"offset": "0%"
},{
"color": "#206DFF",
"offset": "100%"
}
];
// Parses an array of stop information and appends <stop> elements to the <linearGradient>
for (var i = 0, length = stops.length; i < length; i++) {
// Create a <stop> element and set its offset based on the position of the for loop.
var stop = document.createElementNS(svgns, 'stop');
stop.setAttribute('offset', stops[i].offset);
stop.setAttribute('stop-color', stops[i].color);
// Add the stop to the <lineargradient> element.
gradient.appendChild(stop);
}
// Apply the <lineargradient> to <defs>
gradient.id = 'Gradient';
gradient.setAttribute('x1', '0');
gradient.setAttribute('x2', '0');
gradient.setAttribute('y1', '0');
gradient.setAttribute('y2', '1');
defs.appendChild(gradient);
// Setup the <rect> element.
rect.setAttribute('fill', 'url(#Gradient)');
rect.setAttribute('width', '100%');
rect.setAttribute('height', '100%');
// Assign an id, classname, width and height
svg.setAttribute('width', '100%');
svg.setAttribute('height', '100%')
svg.setAttribute('version', '1.1');
svg.setAttribute('xmlns', svgns);
// Add the <defs> and <rect> elements to <svg>
svg.appendChild(defs);
svg.appendChild(rect);
// Add the <svg> element to <body>
document.body.appendChild(svg);