问题
I'm trying to run this script https://ga-dev-tools.appspot.com/embed-api/third-party-visualizations/
The problem is that when I enter the browser console gives me this error:
Uncaught TypeError: Cannot set property 'innerHTML' of null
so I thought enough to add
<div id="view-name"></div>
in the code and in fact part of the script, but with a horrible graphics.
That does not fully reflect the real one.
The script is used in this way:
{literal}
<script>
(function(w,d,s,g,js,fs){
g=w.gapi||(w.gapi={});g.analytics={q:[],ready:function(f){this.q.push(f);}};
js=d.createElement(s);fs=d.getElementsByTagName(s)[0];
js.src='https://apis.google.com/js/platform.js';
fs.parentNode.insertBefore(js,fs);js.onload=function(){g.load('analytics');};
}(window,document,'script'));
</script>
{/literal}
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/1.0.2/Chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.10.2/moment.min.js"></script>
<script src="https://ga-dev-tools.appspot.com/public/javascript/embed-api/components/view-selector2.js"></script>
<script src="https://ga-dev-tools.appspot.com/public/javascript/embed-api/components/date-range-selector.js"></script>
<script src="https://ga-dev-tools.appspot.com/public/javascript/embed-api/components/active-users.js"></script>
<header class="boxHeadline">
<h1>Benvenuto nel pannello di amministrazione</h1>
</header>
<article>
<div id="embed-api-auth-container"></div>
<div id="view-selector-container"></div>
<div id="active-users-container"></div>
<div id="view-name"></div>
<div id="chart-1-container"></div>
<div id="legend-1-container"></div>
<div id="chart-2-container"></div>
<div id="legend-2-container"></div>
<div id="chart-3-container"></div>
<div id="legend-3-container"></div>
<div id="chart-4-container"></div>
<div id="legend-4-container"></div>
</article>
{literal}
<script>
// == NOTE ==
// This code uses ES6 promises. If you want to use this code in a browser
// that doesn't supporting promises natively, you'll have to include a polyfill.
gapi.analytics.ready(function() {
/**
* Authorize the user immediately if the user has already granted access.
* If no access has been created, render an authorize button inside the
* element with the ID "embed-api-auth-container".
*/
gapi.analytics.auth.authorize({
container: 'embed-api-auth-container',
clientid: 'xxxxxxx.apps.googleusercontent.com'
});
/**
* Create a new ActiveUsers instance to be rendered inside of an
* element with the id "active-users-container" and poll for changes every
* five seconds.
*/
var activeUsers = new gapi.analytics.ext.ActiveUsers({
container: 'active-users-container',
pollingInterval: 5
});
/**
* Add CSS animation to visually show the when users come and go.
*/
activeUsers.once('success', function() {
var element = this.container.firstChild;
var timeout;
this.on('change', function(data) {
var element = this.container.firstChild;
var animationClass = data.delta > 0 ? 'is-increasing' : 'is-decreasing';
element.className += (' ' + animationClass);
clearTimeout(timeout);
timeout = setTimeout(function() {
element.className =
element.className.replace(/ is-(increasing|decreasing)/g, '');
}, 3000);
});
});
/**
* Create a new ViewSelector2 instance to be rendered inside of an
* element with the id "view-selector-container".
*/
var viewSelector = new gapi.analytics.ext.ViewSelector2({
container: 'view-selector-container',
})
.execute();
/**
* Update the activeUsers component, the Chartjs charts, and the dashboard
* title whenever the user changes the view.
*/
viewSelector.on('viewChange', function(data) {
var title = document.getElementById('view-name');
title.innerHTML = data.property.name + ' (' + data.view.name + ')';
// Start tracking active users for this view.
activeUsers.set(data).execute();
// Render all the of charts for this view.
renderWeekOverWeekChart(data.ids);
renderYearOverYearChart(data.ids);
renderTopBrowsersChart(data.ids);
renderTopCountriesChart(data.ids);
});
/**
* Draw the a chart.js line chart with data from the specified view that
* overlays session data for the current week over session data for the
* previous week.
*/
function renderWeekOverWeekChart(ids) {
// Adjust `now` to experiment with different days, for testing only...
var now = moment(); // .subtract(3, 'day');
var thisWeek = query({
'ids': ids,
'dimensions': 'ga:date,ga:nthDay',
'metrics': 'ga:sessions',
'start-date': moment(now).subtract(1, 'day').day(0).format('YYYY-MM-DD'),
'end-date': moment(now).format('YYYY-MM-DD')
});
var lastWeek = query({
'ids': ids,
'dimensions': 'ga:date,ga:nthDay',
'metrics': 'ga:sessions',
'start-date': moment(now).subtract(1, 'day').day(0).subtract(1, 'week')
.format('YYYY-MM-DD'),
'end-date': moment(now).subtract(1, 'day').day(6).subtract(1, 'week')
.format('YYYY-MM-DD')
});
Promise.all([thisWeek, lastWeek]).then(function(results) {
var data1 = results[0].rows.map(function(row) { return +row[2]; });
var data2 = results[1].rows.map(function(row) { return +row[2]; });
var labels = results[1].rows.map(function(row) { return +row[0]; });
labels = labels.map(function(label) {
return moment(label, 'YYYYMMDD').format('ddd');
});
var data = {
labels : labels,
datasets : [
{
label: 'Last Week',
fillColor : 'rgba(220,220,220,0.5)',
strokeColor : 'rgba(220,220,220,1)',
pointColor : 'rgba(220,220,220,1)',
pointStrokeColor : '#fff',
data : data2
},
{
label: 'This Week',
fillColor : 'rgba(151,187,205,0.5)',
strokeColor : 'rgba(151,187,205,1)',
pointColor : 'rgba(151,187,205,1)',
pointStrokeColor : '#fff',
data : data1
}
]
};
new Chart(makeCanvas('chart-1-container')).Line(data);
generateLegend('legend-1-container', data.datasets);
});
}
/**
* Draw the a chart.js bar chart with data from the specified view that
* overlays session data for the current year over session data for the
* previous year, grouped by month.
*/
function renderYearOverYearChart(ids) {
// Adjust `now` to experiment with different days, for testing only...
var now = moment(); // .subtract(3, 'day');
var thisYear = query({
'ids': ids,
'dimensions': 'ga:month,ga:nthMonth',
'metrics': 'ga:users',
'start-date': moment(now).date(1).month(0).format('YYYY-MM-DD'),
'end-date': moment(now).format('YYYY-MM-DD')
});
var lastYear = query({
'ids': ids,
'dimensions': 'ga:month,ga:nthMonth',
'metrics': 'ga:users',
'start-date': moment(now).subtract(1, 'year').date(1).month(0)
.format('YYYY-MM-DD'),
'end-date': moment(now).date(1).month(0).subtract(1, 'day')
.format('YYYY-MM-DD')
});
Promise.all([thisYear, lastYear]).then(function(results) {
var data1 = results[0].rows.map(function(row) { return +row[2]; });
var data2 = results[1].rows.map(function(row) { return +row[2]; });
var labels = ['Jan','Feb','Mar','Apr','May','Jun',
'Jul','Aug','Sep','Oct','Nov','Dec'];
// Ensure the data arrays are at least as long as the labels array.
// Chart.js bar charts don't (yet) accept sparse datasets.
for (var i = 0, len = labels.length; i < len; i++) {
if (data1[i] === undefined) data1[i] = null;
if (data2[i] === undefined) data2[i] = null;
}
var data = {
labels : labels,
datasets : [
{
label: 'Last Year',
fillColor : 'rgba(220,220,220,0.5)',
strokeColor : 'rgba(220,220,220,1)',
data : data2
},
{
label: 'This Year',
fillColor : 'rgba(151,187,205,0.5)',
strokeColor : 'rgba(151,187,205,1)',
data : data1
}
]
};
new Chart(makeCanvas('chart-2-container')).Bar(data);
generateLegend('legend-2-container', data.datasets);
})
.catch(function(err) {
console.error(err.stack);
});
}
/**
* Draw the a chart.js doughnut chart with data from the specified view that
* show the top 5 browsers over the past seven days.
*/
function renderTopBrowsersChart(ids) {
query({
'ids': ids,
'dimensions': 'ga:browser',
'metrics': 'ga:pageviews',
'sort': '-ga:pageviews',
'max-results': 5
})
.then(function(response) {
var data = [];
var colors = ['#4D5360','#949FB1','#D4CCC5','#E2EAE9','#F7464A'];
response.rows.forEach(function(row, i) {
data.push({ value: +row[1], color: colors[i], label: row[0] });
});
new Chart(makeCanvas('chart-3-container')).Doughnut(data);
generateLegend('legend-3-container', data);
});
}
/**
* Draw the a chart.js doughnut chart with data from the specified view that
* compares sessions from mobile, desktop, and tablet over the past seven
* days.
*/
function renderTopCountriesChart(ids) {
query({
'ids': ids,
'dimensions': 'ga:country',
'metrics': 'ga:sessions',
'sort': '-ga:sessions',
'max-results': 5
})
.then(function(response) {
var data = [];
var colors = ['#4D5360','#949FB1','#D4CCC5','#E2EAE9','#F7464A'];
response.rows.forEach(function(row, i) {
data.push({
label: row[0],
value: +row[1],
color: colors[i]
});
});
new Chart(makeCanvas('chart-4-container')).Doughnut(data);
generateLegend('legend-4-container', data);
});
}
/**
* Extend the Embed APIs `gapi.analytics.report.Data` component to
* return a promise the is fulfilled with the value returned by the API.
* @param {Object} params The request parameters.
* @return {Promise} A promise.
*/
function query(params) {
return new Promise(function(resolve, reject) {
var data = new gapi.analytics.report.Data({query: params});
data.once('success', function(response) { resolve(response); })
.once('error', function(response) { reject(response); })
.execute();
});
}
/**
* Create a new canvas inside the specified element. Set it to be the width
* and height of its container.
* @param {string} id The id attribute of the element to host the canvas.
* @return {RenderingContext} The 2D canvas context.
*/
function makeCanvas(id) {
var container = document.getElementById(id);
var canvas = document.createElement('canvas');
var ctx = canvas.getContext('2d');
container.innerHTML = '';
canvas.width = container.offsetWidth;
canvas.height = container.offsetHeight;
container.appendChild(canvas);
return ctx;
}
/**
* Create a visual legend inside the specified element based off of a
* Chart.js dataset.
* @param {string} id The id attribute of the element to host the legend.
* @param {Array.<Object>} items A list of labels and colors for the legend.
*/
function generateLegend(id, items) {
var legend = document.getElementById(id);
legend.innerHTML = items.map(function(item) {
var color = item.color || item.fillColor;
var label = item.label;
return '<li><i style="background:' + color + '"></i>' + label + '</li>';
}).join('');
}
// Set some global Chart.js defaults.
Chart.defaults.global.animationSteps = 60;
Chart.defaults.global.animationEasing = 'easeInOutQuart';
Chart.defaults.global.responsive = true;
Chart.defaults.global.maintainAspectRatio = false;
});
</script>
{/literal}
</div>
</section>
Below the article tag is the rest of the javascript code.
How can I resolve to see perfectly the embed?
Thank you for your answers.
P.S. Embed API Third party visualization > Uncaught TypeError: Cannot set property 'innerHTML' of null (cb=gapi.loaded_0:139) How could I understand I They try to follow this question. But unfortunately I had that result. It is as if he were reading the javascript code.
来源：https://stackoverflow.com/questions/31504144/embed-api-third-party-visualizations