How to reset Zoom in d3.js?

Question

I have a simple svg rectangle and I have added zooming and panning on it using d3.js. I have also added a button in order to try and reset the zoom once the button is clicke

Answer 1

You need to rewrite your code this way:

function zoomed() {
  gElem.attr("transform", d3.event.transform)
}

var zoom = d3.zoom().on("zoom", zoomed);

var svg = d3.select("body")
  .append("svg")
  .attr("width", "600")
  .attr("height", "600")


var gElem = svg.append("g").call(zoom);

gElem.append("rect")
  .attr("x", 50)
  .attr("y", 50)
  .attr("width", 300)
  .attr("height", 200)
  .style("fill", "#B8DEE6")

$("#Reset").click(() => {
  gElem.transition()
    .duration(750)
    .call(zoom.transform, d3.zoomIdentity);
});

Check demo:

function zoomed() {
  gElem.attr("transform", d3.event.transform)
}

var zoom = d3.zoom().on("zoom", zoomed);

var svg = d3.select("body")
  .append("svg")
  .attr("width", "400")
  .attr("height", "200")
  

var gElem = svg.append("g").call(zoom);

gElem.append("rect")
  .attr("x", 50)
  .attr("y", 50)
  .attr("width", 300)
  .attr("height", 200)
  .style("fill", "#B8DEE6")

$("#Reset").click(() => {
  gElem.transition()
    .duration(750)
    .call(zoom.transform, d3.zoomIdentity);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.13.0/d3.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="Reset">RESET</button>