How to animate my SVG path

Question

I have a SVG I am trying to animate with animejs.

Basically its a selection path drawing.

I managed to animate but the result is wrong.

I want this:

var lineDrawing = anime({
  targets: 'path',
  strokeDashoffset: [anime.setDashoffset, 0],
  easing: 'easeInOutCubic',
  duration: 4000,
  begin: function(anim) {
    document.querySelector('path').setAttribute("stroke", "#4a56f2");
    document.querySelector('path').setAttribute("fill", "none");
  },
  complete: function(anim) {
  },
  autoplay: false
});

document.querySelector('.play-drawing').onclick = lineDrawing.restart;

body {
  margin: 20px;
  font-family: 'Lato';
  font-weight: 300;
  font-size: 1.2em;
}

#anime-demo {
  position: relative;
}

svg {
   padding: 10px;
}

button {
  background: orange;
  color: white;
  margin: 5px;
  padding: 10px;
  border-radius: 4px;
  font-family: 'Lato';
  cursor: pointer;
  border: none;
  outline: none;
}

button:hover {
  background: blue;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/animejs/2.0.2/anime.min.js"></script>
<div class="controls">
<button class="play-drawing">Draw the Anchor</button>
</div>

<div id="anime-demo">
<svg width="400" height="631" ></path><path id="path1" d="M182.961 0.223 L 181.958 0.347 181.958 4.954 L 181.958 9.561 186.584 9.561 L 191.210 9.561 191.210 4.780 L 191.210 0.000 187.587 0.049 C 185.594 0.077,183.512 0.155,182.961 0.223 M199.708 4.460 C 199.433 10.013,199.025 9.561,204.303 9.561 C 209.559 9.561,209.098 10.067,209.098 4.292 L 209.098 0.000 204.513 0.000 L 199.929 0.000 199.708 4.460 M217.625 1.928 C 217.518 2.818,217.429 4.882,217.428 6.515 L 217.425 9.483 218.389 9.676 C 218.919 9.782,220.980 9.869,222.969 9.869 L 226.586 9.869 226.786 7.509 C 226.896 6.212,226.985 4.151,226.985 2.930 L 226.985 0.710 223.978 0.511 C 222.325 0.401,220.262 0.311,219.395 0.310 L 217.819 0.308 217.625 1.928 M166.230 0.904 C 164.958 1.000,163.922 1.218,163.928 1.388 C 164.037 4.308,164.492 9.860,164.643 10.101 C 164.823 10.390,173.262 10.014,173.587 9.703 C 173.648 9.645,173.596 7.577,173.473 5.107 L 173.248 0.617 170.896 0.672 C 169.602 0.703,167.502 0.807,166.230 0.904 M235.518 1.621 C 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325.906 C 71.853 327.899,71.769 330.028,71.668 330.637 L 71.485 331.745 75.295 332.119 C 77.391 332.325,79.470 332.563,79.915 332.647 C 80.998 332.852,81.030 332.725,81.287 327.093 L 81.508 322.282 76.683 322.282 L 71.858 322.282 71.855 325.906 M379.847 334.785 C 374.729 336.011,375.250 335.499,375.935 338.635 C 376.250 340.073,376.663 342.024,376.854 342.971 L 377.201 344.694 381.702 343.830 C 384.178 343.354,386.246 342.924,386.296 342.874 C 386.459 342.710,384.493 333.692,384.302 333.727 C 384.200 333.746,382.196 334.222,379.847 334.785 M70.172 340.833 C 69.681 342.912,68.475 349.226,68.554 349.305 C 68.740 349.490,77.447 351.337,77.568 351.216 C 77.714 351.070,79.583 341.924,79.482 341.847 C 79.445 341.819,77.679 341.490,75.559 341.117 C 73.439 340.744,71.398 340.365,71.023 340.274 C 70.495 340.146,70.305 340.271,70.172 340.833 M383.192 352.103 C 380.817 352.528,378.838 352.909,378.793 352.952 C 378.708 353.031,379.916 361.034,380.103 361.637 C 380.201 361.953,389.013 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570.446,4.950 570.614,6.665 570.721 L 9.782 570.916 9.972 569.113 C 10.637 562.787,10.621 561.955,9.833 561.794 C 9.150 561.655,2.373 560.987,1.641 560.987 C 1.461 560.987,1.228 561.785,1.124 562.760 M382.125 566.526 C 381.369 568.724,380.820 570.592,380.906 570.678 C 381.421 571.192,389.342 573.911,389.514 573.632 C 389.951 572.925,392.425 565.337,392.270 565.182 C 392.066 564.977,384.259 562.529,383.817 562.530 C 383.643 562.530,382.882 564.329,382.125 566.526 M375.616 581.998 C 374.585 584.055,373.855 585.843,373.995 585.971 C 374.350 586.296,381.893 590.301,381.975 590.208 C 382.203 589.948,386.141 581.882,386.063 581.834 C 385.632 581.567,377.897 578.245,377.720 578.251 C 377.594 578.254,376.648 579.941,375.616 581.998 M0.000 583.453 L 0.000 588.126 4.596 588.126 L 9.193 588.126 9.312 583.732 C 9.377 581.315,9.418 579.307,9.403 579.270 C 9.387 579.233,7.265 579.107,4.687 578.991 L 0.000 578.779 0.000 583.453 M367.227 596.588 L 364.874 600.116 368.578 602.763 C 370.615 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</div>

Answer 1

Updated Answer: For what OP is trying to achieve. Still in pure css.

Explanation:

1. Look 'Previous Answer' on how to make it work like in the gif.
2. Now how to make each dash line like square. In blue line our length of each dashes is 10. We can make the stroke-width = 10 so they look like square. Now each square should only have outline and no fill. We will create another mask which blocks out the inner portion in each square.

path {
  fill: none
}

.path {
  stroke-dasharray: 10;
  stroke: blue;
  stroke-width: 10;
}


/* Let the outline width of each square be 1 */

.maskSquare {
  stroke: black;
  /* To block or remove inner blue portion */
  stroke-width: 8;
  /* blue-dash-length minus 2*sqaure-length = 10 - 2 */
  stroke-dasharray: 8 12;
  /* 8+12 == 20 as in blue-dash-line 10+10 == 20 */
  stroke-dashoffset: -1;
  /* To sync */
}

.maskLineLength {
  stroke: white;
  stroke-width: 11;
  animation: array 3s linear infinite;
}

@keyframes array {
  from {
    stroke-dasharray: 0 2000;
  }
  to {
    stroke-dasharray: 1000 2000;
  }
}

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="340px" height="333px" viewBox="0 0 340 333" enable-background="new 0 0 340 333" xml:space="preserve">
  <defs>
     <mask id="mask">
           <path  class='maskLineLength' d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
          s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
          C46.039,146.545,53.039,128.545,66.039,133.545z"/>
       <path  class='maskSquare' d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
          s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
          C46.039,146.545,53.039,128.545,66.039,133.545z"/>
        </mask>
  </defs>
  <path mask="url(#mask)" class="path" d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
    s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
    C46.039,146.545,53.039,128.545,66.039,133.545z"/>
</svg>

Previous Answer: for the gif you provided

It can be done in pure css.

First, Blue dash path.

.path {
  stroke-dasharray: 10;
  stroke: blue;
}

<svg width="340px" height="333px">
  <path class="path" fill="none" stroke-width="3" stroke-miterlimit="10" d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
    s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
    C46.039,146.545,53.039,128.545,66.039,133.545z"/>
</svg>

Next a Masking path, using same path 1px greater stroke width.

.maskPath {
  animation: array 3s linear infinite;
}

@keyframes array {
  from {
    stroke-dasharray: 0 2000;
  }
  to {
    stroke-dasharray: 1000 2000;
  }
}

<svg width="340px" height="333px">
  
           <path fill='none' class='maskPath' stroke="darkGray" stroke-width='4' d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
          s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
          C46.039,146.545,53.039,128.545,66.039,133.545z"/>

</svg>

When mask is applied on blue dash line result follows.

.path {
  stroke-dasharray: 10;
  stroke: blue;
}

.maskPath {
  animation: array 3s linear infinite;
}

@keyframes array {
  from {
    stroke-dasharray: 0 2000;
  }
  to {
    stroke-dasharray: 1000 2000;
  }
}

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="340px" height="333px" viewBox="0 0 340 333" enable-background="new 0 0 340 333" xml:space="preserve">
  <defs>
     <mask id="mask">
           <path fill='none' class='maskPath' stroke="white" stroke-width='4' d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
          s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
          C46.039,146.545,53.039,128.545,66.039,133.545z"/>
        </mask>
  </defs>
  <path mask="url(#mask)" class="path" fill="none" stroke="#000000" stroke-width="3" d="M66.039,133.545c0,0-21-57,18-67s49-4,65,8
    s30,41,53,27s66,4,58,32s-5,44,18,57s22,46,0,45s-54-40-68-16s-40,88-83,48s11-61-11-80s-79-7-70-41
    C46.039,146.545,53.039,128.545,66.039,133.545z"/>
</svg>

(I may not be able help further as I am beginner in svg)

Answer 2

Unfortunately, the way you have it setup - with a single path element containing all the blocks will not work. The animation library uses stroke dash width to simulate drawing blocks. Having them all defined in a single path element can only lead to all blocks being animated at the same time.

After breaking them into separate path elements for each block, the other issue is the order to draw them in - by default it will traverse the path elements from top to bottom in the order they are in the HTML. However, the path elements are added in right-left order from top to bottom meaning the animation will start at the top middle block then alternate each one on the left side, right side, left side, etc. Instead, to get them to animate in a clockwise wrap-around order I wrote a function to initially loop through all the elements, calculate the degrees (0-360) in relation to the SVG's center point (remember your high school trigonometry?), then sort the elements based on that degree value.

Since SO requires code (but it is too long to add all of it in an answer), here is the JavaScript, the complete code in in the JSFiddle at the bottom:

// Sort paths via degrees (clockwise)
document.querySelectorAll("svg").forEach(function(svgE){
  var centerCoords = [ svgE.getBoundingClientRect().width / 2,
    svgE.getBoundingClientRect().height / 2
  ];
  var pathsByDeg = [];
  svgE.querySelectorAll("path").forEach(function(pE){
    var coords = (/^M([0-9\.]+)\s+([0-9\.]+)+/.exec(pE.getAttribute("d"))).splice(1,2).map(parseFloat);
    var rad = -Math.atan2(coords[1]-centerCoords[1], coords[0]-centerCoords[0]);
    var deg = ((rad / Math.PI * 180) + (rad > 0 ? 0 : 360)) - 90;
    deg = deg < 0 ? deg + 360 : deg;
    pathsByDeg.push([deg, pE]);
  });
  pathsByDeg.sort(function(a, b){
    return a[0] - b[0];
  });
  pathsByDeg.reduce(function(c,n){
    c[1].parentNode.insertBefore(n[1],c[1]);
    return n;
  }, pathsByDeg[0]);

});
// Setup path animation
var lineDrawing = anime({
  targets: 'svg path',
  easing: 'easeInOutCubic',
  strokeDashoffset: [anime.setDashoffset, 0],
  duration: 1000,
  delay: function(el, i) { return i * 20 },
  autoplay: false,
  begin: function(anim) {
    anim.animatables.forEach(function(elem){
      var t = elem.target;
      t.setAttribute("stroke", "#4a56f2");
      t.setAttribute("fill", "none");
    });
  }
});
document.querySelector('.play-drawing').onclick = lineDrawing.restart;

The full result is available in the JSFiddle: https://jsfiddle.net/jimbo2150/d8gc96em/