se arregla el problema de la version en package.json.

Se sube a version 1.0.12
Se sube a GitHub 1.0.12
Se sube a NPM 1.0.12

example/package-lock.json

@@ -1661,8 +1661,43 @@
       "resolved": "https://registry.npmjs.org/chardet/-/chardet-0.4.2.tgz",
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I="
     },
+    "chart.js": {
+      "version": "2.9.3",
+      "resolved": "https://registry.npmjs.org/chart.js/-/chart.js-2.9.3.tgz",
+      "integrity": "sha512-+2jlOobSk52c1VU6fzkh3UwqHMdSlgH1xFv9FKMqHiNCpXsGPQa/+81AFa+i3jZ253Mq9aAycPwDjnn1XbRNNw==",
+      "requires": {
+        "chartjs-color": "^2.1.0",
+        "moment": "^2.10.2"
+      }
+    },
     "chartjs-2-react": {
-      "version": "file:.."
+      "version": "file:..",
+      "requires": {
+        "chart.js": "^2.9.3",
+        "chartjs-chart-radial-gauge": "^1.0.3"
+      }
+    },
+    "chartjs-chart-radial-gauge": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/chartjs-chart-radial-gauge/-/chartjs-chart-radial-gauge-1.0.3.tgz",
+      "integrity": "sha512-orm3XGWww46rmsKvAnwyOhXA5MtVfjsxfD463iE/gBBVOfozeFnsydZWx8Rqj5fy3DoxZROYUCR02RexvoMsHQ=="
+    },
+    "chartjs-color": {
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/chartjs-color/-/chartjs-color-2.4.1.tgz",
+      "integrity": "sha512-haqOg1+Yebys/Ts/9bLo/BqUcONQOdr/hoEr2LLTRl6C5LXctUdHxsCYfvQVg5JIxITrfCNUDr4ntqmQk9+/0w==",
+      "requires": {
+        "chartjs-color-string": "^0.6.0",
+        "color-convert": "^1.9.3"
+      }
+    },
+    "chartjs-color-string": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/chartjs-color-string/-/chartjs-color-string-0.6.0.tgz",
+      "integrity": "sha512-TIB5OKn1hPJvO7JcteW4WY/63v6KwEdt6udfnDE9iCAZgy+V4SrbSxoIbTw/xkUIapjEI4ExGtD0+6D3KyFd7A==",
+      "requires": {
+        "color-name": "^1.0.0"
+      }
     },
     "chokidar": {
       "version": "2.1.8",
@@ -3462,9 +3497,9 @@
       }
     },
     "esprima": {
-      "version": "2.7.3",
+      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.3.tgz",
+      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
-      "integrity": "sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE="
+      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A=="
     },
     "esquery": {
       "version": "1.0.1",
@@ -5808,12 +5843,12 @@
       "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
     },
     "js-yaml": {
-      "version": "3.7.0",
+      "version": "3.13.1",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.7.0.tgz",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz",
-      "integrity": "sha1-XJZ93YN6m/3KXy3oQlOr6KHAO4A=",
+      "integrity": "sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==",
       "requires": {
         "argparse": "^1.0.7",
-        "esprima": "^2.6.0"
+        "esprima": "^4.0.0"
       }
     },
     "jsbn": {
@@ -6401,6 +6436,11 @@
         "minimist": "0.0.8"
       }
     },
+    "moment": {
+      "version": "2.24.0",
+      "resolved": "https://registry.npmjs.org/moment/-/moment-2.24.0.tgz",
+      "integrity": "sha512-bV7f+6l2QigeBBZSM/6yTNq4P2fNpSWj/0e7jQcy87A8e7o2nAfP/34/2ky5Vw4B9S446EtIhodAzkFCcR4dQg=="
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
@@ -9939,6 +9979,22 @@
         "mkdirp": "~0.5.1",
         "sax": "~1.2.1",
         "whet.extend": "~0.9.9"
+      },
+      "dependencies": {
+        "esprima": {
+          "version": "2.7.3",
+          "resolved": "https://registry.npmjs.org/esprima/-/esprima-2.7.3.tgz",
+          "integrity": "sha1-luO3DVd59q1JzQMmc9HDEnZ7pYE="
+        },
+        "js-yaml": {
+          "version": "3.7.0",
+          "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.7.0.tgz",
+          "integrity": "sha1-XJZ93YN6m/3KXy3oQlOr6KHAO4A=",
+          "requires": {
+            "argparse": "^1.0.7",
+            "esprima": "^2.6.0"
+          }
+        }
       }
     },
     "sw-precache": {

example/src/App.js

@@ -5,10 +5,14 @@ import { RadialGauge } from 'chartjs-2-react'
 export default class App extends Component {
   render () {
     return (
+      <div>
+
         <div style={{maxWidth: '600px', marginTop: '25px'}}>
           <h3 style={{textAlign: 'center'}}>RadialGauge Component:</h3>
           <RadialGauge />
         </div>
+
+      </div>
     )
   }
 }

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "chartjs-2-react",
-  "version": "1.0.0",
+  "version": "1.0.10",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "chartjs-2-react",
-  "version": "1.0.9",
+  "version": "1.0.12",
   "description": "Libreria de chart.js para React.js",
   "author": "aleleba",
   "license": "MIT",

src/RadialGauge.jsx

@@ -4,6 +4,8 @@ import Chart from 'chart.js';
 
 import 'chartjs-chart-radial-gauge/build/Chart.RadialGauge.umd.min.js';
 
+import ID from './Service/ID.js'
+
 class RadialGauge extends Component {
 
   constructor(props) { 
@@ -12,7 +14,10 @@ class RadialGauge extends Component {
     let porcentaje = Math.round(Math.random() * 100),
         porcentajeTexto = `${porcentaje} %`
         
+    let id = this.props.id ? this.props.id : ID()
+
     this.state = {
+      id,
       chart: null,
       porcentaje,
       porcentajeTexto
@@ -22,7 +27,7 @@ class RadialGauge extends Component {
 
   componentDidMount() {
 
-    var ctx = document.getElementById('chart').getContext('2d');
+    var ctx = document.getElementById(`${this.state.id}`).getContext('2d');
 
       var config = {
         type: 'radialGauge',
@@ -110,10 +115,10 @@ class RadialGauge extends Component {
 
       this.state.chart.update();
 
-      return <canvas id="chart" />
+      return <canvas id={`${this.state.id}`} />
 
     } else { 
-      return <canvas id="chart" />
+      return <canvas id={`${this.state.id}`} />
     }
   }
 }

src/Service/ID.js

@@ -0,0 +1,25 @@
+// Generate unique IDs for use as pseudo-private/protected names.
+// Similar in concept to
+// <http://wiki.ecmascript.org/doku.php?id=strawman:names>.
+//
+// The goals of this function are twofold:
+// 
+// * Provide a way to generate a string guaranteed to be unique when compared
+//   to other strings generated by this function.
+// * Make the string complex enough that it is highly unlikely to be
+//   accidentally duplicated by hand (this is key if you're using `ID`
+//   as a private/protected name on an object).
+//
+// Use:
+//
+//     var privateName = ID();
+//     var o = { 'public': 'foo' };
+//     o[privateName] = 'bar';
+var ID = function () {
+  // Math.random should be unique because of its seeding algorithm.
+  // Convert it to base 36 (numbers + letters), and grab the first 9 characters
+  // after the decimal.
+  return '_' + Math.random().toString(36).substr(2, 9);
+};
+
+export default ID