Why this basic VEXFLOW code is rendering nothing? - javascript

I have a piece of code in VEXFLOW
<!DOCTYPE html>
<html><head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://unpkg.com/vexflow/releases/vexflow-min.js"></script>
<script>
$(function() {
import Vex from 'vexflow';
const vf = new Vex.Flow.Factory({
renderer: {elementId: 'boo', width: 500, height: 200}
});
const score = vf.EasyScore();
const system = vf.System();
system.addStave({
voices: [
score.voice(score.notes('C#5/q, B4, A4, G#4', {stem: 'up'})),
score.voice(score.notes('C#4/h, C#4', {stem: 'down'}))
]
}).addClef('treble').addTimeSignature('4/4');
vf.draw();
});
</script>
</head>
<body>
<div id="boo"></div>
</body></html>
Why this code is not rendering nothing.
Nothing is visible in browser.

<!DOCTYPE html>
<html>
<body>
<div id="boo"></div>
</body>
</html>
<script src="https://unpkg.com/vexflow/releases/vexflow-min.js"></script>
<script>
const vf = new Vex.Flow.Factory({
renderer: { elementId: "boo", width: 500, height: 200 }
});
const score = vf.EasyScore();
const system = vf.System();
system
.addStave({
voices: [
score.voice(score.notes("C#5/q, B4, A4, G#4", { stem: "up" })),
score.voice(score.notes("C#4/h, C#4", { stem: "down" }))
]
})
.addClef("treble")
.addTimeSignature("4/4");
vf.draw();
</script>

Related

Error trying to visualize data from neo4j using neovis.js

I want to visualize the graph from my neo4j database like this using HTML Graph in Neo4j.
When I try to run this code
<html>
<head>
<title>DataViz</title>
<style type="text/css">
#viz {
width: 900px;
height: 700px;
}
</style>
<script src="https://unpkg.com/neovis.js#2.0.2/dist/neovis-without-dependencies.js"></script>
</head>
<script type="text/javascript">
var viz;
function draw() {
var config = {
container_id: "viz",
server_url: "bolt://localhost",
server_user: "neo4j",
server_password: "***",
labels: {
},
relationships: {
},
initial_cypher: "MATCH p= (:Idea)-[:contains]->(:Keyphrase) RETURN p"
}
viz = new NeoVis.default(config);
viz.render();
}
</script>
<body onload="draw()">
<div id="viz"></div>
</body>
</html>
I get the following errors. I tried to follow this tutorial https://www.youtube.com/watch?v=0-1A7f8993M&t=317s&ab_channel=Neo4j but can't get it to work. I am very unexperienced with HTML and js so would very much appreciate some help with this simple example.
This is working for me. The fixes are 1) location of Neovis.js 2) and change the config parameter names like serverUrl instead of server_url.
<html>
<head>
<title>DataViz</title>
<style type="text/css">
#viz {
width: 900px;
height: 700px;
}
</style>
<script src="https://rawgit.com/neo4j-contrib/neovis.js/master/dist/neovis.js"></script>
</head>
<script type="text/javascript">
var viz;
function draw() {
var config = {
containerId: "viz",
neo4j: {
serverUrl: "bolt://localhost:7687",
serverUser: "neo4j",
serverPassword: "awesome_password"
},
labels: {
},
relationships: {
},
initialCypher: "MATCH p = (:Character)-[:INTERACTS]->(:Character) RETURN p LIMIT 10"
};
viz = new NeoVis.default(config);
viz.render();
}
</script>
<body onload="draw()">
<div id="viz"></div>
</body>
</html>

set Theme using plugin in Chartjs 3.9.1

I'm trying to set theme using plugin in New version of chartjs 3.9.1, i'm trying to add "chartjs-plugin-colorschemes" plugin, link is: https://nagix.github.io/chartjs-plugin-colorschemes/.
In old version of chartjs v2.9.3 is working fine with this plugin.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div class="chartMenu">
<p>WWW.CHARTJS3.COM (Chart JS 3.9.1)</p>
</div>
<div class="chartCard">
<div class="chartBox" style="width: 500px">
<canvas id="myChart"></canvas>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script type="text/javascript"
src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-colorschemes/0.4.0/chartjs-plugin-colorschemes.min.js">
</script>
<script>
const data = {
labels: ['January', 'February', 'March', 'April', 'May', 'June', 'July'],
datasets: [1, 2, 3].map(function (i) {
return {
label: 'Dataset ' + i,
data: [0, 0, 0, 0, 0, 0, 0].map(Math.random),
fill: false
}
})
};
const config = {
type: 'line',
data,
options: {
plugins: [
{
"colorschemes": {
scheme: 'brewer.RdYlBu3',
}
}]
},
};
const myChart = new Chart(
document.getElementById('myChart'),
config
);
</script>
</body>
</html>
Here is the code that I tried, can someone please guide me what i missed.
thanks.
It was never correctly updated for V3 so the only thing you can try is if the export they do also works for CDN version of distribution and try to register it. Otherwise you will need to wait until or if the plugin ever gets updated to work with V3 and above:
This might work if CDN version supports it, otherwise you are out of luck and need to stay with V2 or implement the plugin and coloring yourself:
Chart.register(ColorSchemesPlugin);
const data = {};
const config = {};
new Chart(ctx, config);
The demo site uses chart.js v2.8.0. As you can see on this page, the plugin you try to use doesn't work for chart.js v3 and later.
You probably can take a look at this pluging and adapt it to your need to generate the colors you want to use.
Here is some work around,
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Getting Started with Chart JS with www.chartjs3.com</title>
</head>
<body>
<div class="chartMenu">
<p>WWW.CHARTJS3.COM (Chart JS 3.9.1)</p>
</div>
<div class="chartCard">
<div class="chartBox">
<canvas id="myChart"></canvas>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/hammer.js/2.0.8/hammer.min.js"
integrity="sha512-UXumZrZNiOwnTcZSHLOfcTs0aos2MzBWHXOHOuB0J/R44QB0dwY5JgfbvljXcklVf65Gc4El6RjZ+lnwd2az2g=="
crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/chartjs-plugin-zoom/1.2.1/chartjs-plugin-zoom.min.js"
integrity="sha512-klQv6lz2YR+MecyFYMFRuU2eAl8IPRo6zHnsc9n142TJuJHS8CG0ix4Oq9na9ceeg1u5EkBfZsFcV3U7J51iew=="
crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script>
const dt = [];
const labels = [];
for (let index = 1; index < 20; index++) {
labels.push("Label_" + index);
dt.push(index);
}
var ThemeDictionary = {
Classic10: ["#1f77b4", "#ff7f0e", "#2ca02c", "#d62728", "#9467bd", "#8c564b", "#e377c2", "#7f7f7f", "#bcbd22", "#17becf"],
ClassicMedium10: ["#729ece", "#ff9e4a", "#67bf5c", "#ed665d", "#ad8bc9", "#a8786e", "#ed97ca", "#a2a2a2", "#cdcc5d", "#6dccda"],
ClassicLight10: ["#aec7e8", "#ffbb78", "#98df8a", "#ff9896", "#c5b0d5", "#c49c94", "#f7b6d2", "#c7c7c7", "#dbdb8d", "#9edae5"],
Classic20: ["#1f77b4", "#aec7e8", "#ff7f0e", "#ffbb78", "#2ca02c", "#98df8a", "#d62728", "#ff9896", "#9467bd", "#c5b0d5", "#8c564b", "#c49c94", "#e377c2", "#f7b6d2", "#7f7f7f", "#c7c7c7", "#bcbd22", "#dbdb8d", "#17becf", "#9edae5"],
ClassicGray5: ["#60636a", "#a5acaf", "#414451", "#8f8782", "#cfcfcf"],
ClassicColorBlind10: ["#006ba4", "#ff800e", "#ababab", "#595959", "#5f9ed1", "#c85200", "#898989", "#a2c8ec", "#ffbc79", "#cfcfcf"],
ClassicTrafficLight9: ["#b10318", "#dba13a", "#309343", "#d82526", "#ffc156", "#69b764", "#f26c64", "#ffdd71", "#9fcd99"],
ClassicPurpleGray6: ["#7b66d2", "#dc5fbd", "#94917b", "#995688", "#d098ee", "#d7d5c5"],
ClassicPurpleGray12: ["#7b66d2", "#a699e8", "#dc5fbd", "#ffc0da", "#5f5a41", "#b4b19b", "#995688", "#d898ba", "#ab6ad5", "#d098ee", "#8b7c6e", "#dbd4c5"],
ClassicGreenOrange6: ["#32a251", "#ff7f0f", "#3cb7cc", "#ffd94a", "#39737c", "#b85a0d"],
ClassicGreenOrange12: ["#32a251", "#acd98d", "#ff7f0f", "#ffb977", "#3cb7cc", "#98d9e4", "#b85a0d", "#ffd94a", "#39737c", "#86b4a9", "#82853b", "#ccc94d"],
ClassicBlueRed6: ["#2c69b0", "#f02720", "#ac613c", "#6ba3d6", "#ea6b73", "#e9c39b"],
ClassicBlueRed12: ["#2c69b0", "#b5c8e2", "#f02720", "#ffb6b0", "#ac613c", "#e9c39b", "#6ba3d6", "#b5dffd", "#ac8763", "#ddc9b4", "#bd0a36", "#f4737a"],
ClassicCyclic13: ["#1f83b4", "#12a2a8", "#2ca030", "#78a641", "#bcbd22", "#ffbf50", "#ffaa0e", "#ff7f0e", "#d63a3a", "#c7519c", "#ba43b4", "#8a60b0", "#6f63bb"],
}
var Theme = "Classic10"
// setup
const data = {
labels: labels,
datasets: [{
label: 'Weekly Sales',
data: dt,
backgroundColor: ThemeDictionary[Theme],
borderWidth: 1
}]
};
// config
const config = {
type: 'bar',
data,
options: {
scales: {
y: {
beginAtZero: true
}
},
plugins: {
zoom: {
zoom: {
wheel: {
enabled: true
}
}
}
}
}
};
// render init block
const myChart = new Chart(
document.getElementById('myChart'),
config
);
</script>
</body>
</html>
You can create you own theme colors and add into "ThemeDictionary" dictionary with key and set your key into "Theme" variable, that's it.
Please suggest if anything I missed.

How to update a tree without refreshing whole page?

I'm creating web application with zTree.
The tree is built based on data from the Golang backend.
Tree leaves change custom icons while the application is running.
How to change icons, based on backend data, without refreshing the page?
With http-equiv="refresh" page is blinking and lost focus. Here is working but blinking sample with zTree and refresh (I cut of backend part for simplicity):
<HTML>
<HEAD>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta http-equiv="refresh" content="5">
<link rel="stylesheet" href="../static/css/zTreeStyle/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="../static/js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="../static/js/jquery.ztree.core.js"></script>
</HEAD>
<BODY>
<div id="app">
<TABLE>
<TR>
<TD width=260px valign=top>
<ul id="tree" class="ztree"></ul>
</TD>
<TD valign=top>
<p>Some text</p>
</TD>
</TR>
</TABLE>
<SCRIPT type="text/javascript">
var zTree;
var setting = {
data: {
simpleData: {
enable: true,
idKey: "id",
pIdKey: "pId",
rootPId: ""
}
}
};
var zNodes = [
{id: 1, pId: 0, name: "root", icon:"../static/css/zTreeStyle/img/diy/c16green.png"},
{id: 2, pId: 1, name: "leaf", icon:"../static/css/zTreeStyle/img/diy/c16red.png"},
];
$(document).ready(function () {
var t = $("#tree");
t = $.fn.zTree.init(t, setting, zNodes);
});
</script>
</div>
</BODY>
</HTML>
I try to use Vue.js, but cannot bind data to zTree. Here is not working sample with Vue.js data binding inside script tag:
<HTML>
<HEAD>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="stylesheet" href="../static/css/zTreeStyle/zTreeStyle.css" type="text/css">
<script type="text/javascript" src="../static/js/jquery-1.4.4.min.js"></script>
<script type="text/javascript" src="../static/js/jquery.ztree.core.js"></script>
<script src="https://unpkg.com/vue"></script>
</HEAD>
<BODY>
<div id="app">
<TABLE>
<TR>
<TD width=260px valign=top>
<ul id="tree" class="ztree"></ul>
</TD>
<TD valign=top>
<p>{{ now }}</p>
<p>Some text</p>
</TD>
</TR>
</TABLE>
<SCRIPT type="text/javascript">
var zTree;
var setting = {
data: {
simpleData: {
enable: true,
idKey: "id",
pIdKey: "pId",
rootPId: ""
}
}
};
var zNodes = [
{id: 1, pId: 0, name: "root", icon:"../static/css/zTreeStyle/img/diy/c16green.png"},
{id: 2, pId: 1, name: "leaf", icon:"../static/css/zTreeStyle/img/diy/c16red.png"},
{id: 3, pId: 1, name: "foo", icon: {{ customIcon }} },
];
$(document).ready(function () {
var t = $("#tree");
t = $.fn.zTree.init(t, setting, zNodes);
});
const app = new Vue({
el: '#app',
data: {
now: new Date(),
customIcon : "../static/css/zTreeStyle/img/diy/c16green.png"
},
methods: {
updateDate() {
this.now = new Date();
}
},
mounted() {
setInterval(() => {
this.updateDate();
}, 1000);
},
})
</script>
</div>
</BODY>
</HTML>
Zipped sample (examples are inside template directory): https://drive.google.com/file/d/1Ihv8jLdsEz93aUrFjEugD1l6YvslaUT8
The solution contains a few steps:
use "go-echo-vue" for communication between backend and frontend like here: https://github.com/covrom/go-echo-vue
update zTree data using vue-resource and timer like this:
<script>
new Vue({
// ....
methods: {
updateZNodes() {
// запрашиваем дерево :)
this.$http.get('/znodes').then(function (response) {
zNodes = response.data.items ? response.data.items : []
}, function (error) {
console.log(error)
});
},
},
mounted() {
setInterval(() => {
this.updateZNodes();
}, 5000);
},
// ....
})</script>
refrest zTree nodes information using js:
<script language="JavaScript">
function refreshNode() {
var treeObj = $.fn.zTree.getZTreeObj("tree");
var nodes = treeObj.getNodes();
if (nodes.length > 0) {
for (let i = 0; i < nodes.length; i++) {
c = "static/css/zTreeStyle/img/diy/c16grey.png";
if (zNodes.length >= i) {
c = zNodes[i].icon
}
nodes[i].icon = c;
treeObj.updateNode(nodes[i]);
}
}
};
const timerId = setInterval(
() => {
refreshNode();
},
5000
);
</script>
add async zTree settings:
<script language="JavaScript">
var setting = {
// ....
async: {
enable: true,
url: "",
autoparam: ["id", "icon"],
datatype: "json",
},
// ....
};
</script>
That's all. So we have Vue function http.get to get fresh data from backend, global js variable to use that data both inside Vue code segment and JavaScript blocks.
PS additional information: https://www.tutorialfor.com/blog-188266.htm

Cannot render interactive image using gojs

I would like to create an interactive image using goJs, however when i try and follow the tutorial to create a basic visual the output I get is just a blank box and not an interactive image with the words 'Alpha' and 'Beta' connected by a line.
This is my code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
<script src="go.js"></script>
<script>
function init() {
var $ = gp.GraphObject.make;
myDiagram = $(go.Diagram, "decisionTree");
var nodeDataArray = [
{ key: "Alpha" },
{ key: "Beta" }
];
var linkDataArray = [
{ to: "Beta", from: "Alpha" }
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray)
}
</script>
</head>
<body onload="init"()>
<div id="decisionTree" style="width:300px; height:300px; border:1px solid black;"></div>
</body>
</html>
Tutorial: https://www.youtube.com/watch?v=7cfHF7yAoJE#action=share
You are loading two different versions of the GoJS library. I suggest you remove the line:
<script src="go.js"></script>
EDIT: In addition, there are some typos that I missed before when just reading your code. This actually works:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script src="https://unpkg.com/gojs/release/go-debug.js"></script>
<script>
function init() {
var $ = go.GraphObject.make;
var myDiagram = $(go.Diagram, "decisionTree");
var nodeDataArray = [
{ key: "Alpha" },
{ key: "Beta" }
];
var linkDataArray = [
{ to: "Beta", from: "Alpha" }
];
myDiagram.model = new go.GraphLinksModel(nodeDataArray, linkDataArray)
}
</script>
</head>
<body onload="init()">
<div id="decisionTree" style="width:300px; height:300px; border:1px solid black;"></div>
</body>
</html>

File_get_contents and echo with javascript

I'm not familiar with js. I'd like to get the result of "file_get_contents" function and put it on the "source" (I have marked both with "https://.................).
Thank you in advance.
<script>
var myInit = {
referrer: '',
};
function file_get_contents(filename) {
fetch(filename, myInit).then((resp) => resp.text()).then(function(data) {
content = JSON.parse(data)
fetch(content['some']['media']['content'], myInit).then((resp) =>
resp.text()).then(function(data));});}
file_get_contents("https://.................");
</script>
<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/clappr#latest/dist/clappr.min.js">
</script>
</head>
<div id="player"></div>
<script>
window.onload = function() {
var player = new Clappr.Player({
source: 'http://......................',
parentId: "#player",
height: '100%',
width: '100%',
autoPlay: true,
});};
</script>
</body>
</html>

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