Setting title: {useHTML: true, text: null} throws an error

[sweetro]

Expected behaviour

Based on the documentation, should not show title when {title: {text: null}} (assume this will be the case regardless of other parameters).

Actual behaviour

Errors on {title: {text: null, useHTML: true}}

highcharts.js:51 Uncaught TypeError: Cannot read property 'toString' of null
    at a.SVGElement.getBBox (VM274 highcharts.js:51)
    at a.Chart.<anonymous> (VM274 highcharts.js:236)
    at Array.forEach (<anonymous>)
    at a.each (VM274 highcharts.js:28)
    at a.Chart.layOutTitles (VM274 highcharts.js:236)
    at a.Chart.setTitle (VM274 highcharts.js:236)
    at a.Chart.render (VM274 highcharts.js:251)
    at a.Chart.firstRender (VM274 highcharts.js:255)
    at a.Chart.init (VM274 highcharts.js:230)
    at a.Chart.getArgs (VM274 highcharts.js:229)

Doing a bit of digging it looks like this occurs because the svgElement that is set for title when useHTML is true has a textStr element that is set to null whereas when useHTML is false or undefined the textStr element is undefined. getBBox checks if textStr is undefined, but doesn't check null so errors on the null.toString.

Live demo with steps to reproduce

http://jsfiddle.net/8kqrqkb4/1/

Affected browser(s)

Probably All (Tested Chrome and FF) Highcharts v 6.0.2

[pawelfus]

Hi @sweetro

Thank you for reporting the issue!

[TorsteinHonsi]

@KacperMadej

Thanks for fixing! However the test fails in Edge and IE11:

[KacperMadej]

Resolved through 7ed92fb