\
**Category:** General Usage\
**Tags:** question\
**Created:** [February 17, 2017, 4:34am UTC](https://discourse.julialang.org/t/possibly-incorrect-displayable-text-html-in-v0-6/2145 "2017-02-17T04:34:37Z")\
**Posts on this page:** 4\
**Page:** 1
**Author:**  [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [February 17, 2017, 4:34am UTC](https://discourse.julialang.org/t/possibly-incorrect-displayable-text-html-in-v0-6/2145/1 "2017-02-17T04:34:37Z")
This came up in the attempt to get Interact.jl working on v0.6-dev. It currently fails when trying to display some HTML. A MRE is:
```julia
if displayable("text/html")
display("text/html", """foo""")
end
```
In the REPL in Julia v0.5, `displayable("text/html")` return `false`, which makes sense. In Julia v0.6-dev, however, it returns `true` in the REPL, which leads to errors when trying to actually display:
```julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.6.0-dev.2834 (2017-02-16 21:11 UTC)
_/ |\ __'_|_|_|\__'_| | Commit 3222749* (0 days old master)
|__/ | x86_64-apple-darwin15.6.0
julia> displayable("text/html")
true
julia> if displayable("text/html")
display("text/html", """foo""")
end
ERROR: MethodError: no method matching show(::Base.TTY, ::MIME{Symbol("text/html")}, ::String)
Closest candidates are:
show(::IO, ::MIME{mime}) where mime at multimedia.jl:21
show(::IO, ::ANY) at show.jl:125
show(::IO, ::AbstractString, ::Any) at multimedia.jl:39
...
Stacktrace:
[1] display(::TextDisplay, ::MIME{Symbol("text/html")}, ::String) at ./multimedia.jl:158
[2] display(::MIME{Symbol("text/html")}, ::String) at ./multimedia.jl:208
[3] display(::String, ::String) at ./multimedia.jl:126
```
Specifically, it’s the first display (the Base.TTY) that thinks it can display “text/html”:
```julia
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.6.0-dev.2834 (2017-02-16 21:11 UTC)
_/ |\ __'_|_|_|\__'_| | Commit 3222749* (0 days old master)
|__/ | x86_64-apple-darwin15.6.0
julia> displayable("text/html")
true
julia> displayable(Base.Multimedia.displays[1], "text/html")
true
julia> displayable(Base.Multimedia.displays[2], "text/html")
false
julia> Base.Multimedia.displays[1]
TextDisplay(Base.TTY(RawFD(14) open, 0 bytes waiting))
```
Is this a bug? Or is the package doing something wrong?
---
**Author:**  [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [February 17, 2017, 6:04am UTC](https://discourse.julialang.org/t/possibly-incorrect-displayable-text-html-in-v0-6/2145/2 "2017-02-17T06:04:32Z")
BTW, `git bisect` shows that this change came in with [8950cf80](https://github.com/JuliaLang/julia/commit/8950cf80586f691a3650204366450106afe350ee)
---
**Author:**  [@fengyang.wang](https://discourse.julialang.org/u/fengyang.wang)\
**Post date:** [February 17, 2017, 8:32am UTC](https://discourse.julialang.org/t/possibly-incorrect-displayable-text-html-in-v0-6/2145/3 "2017-02-17T08:32:10Z")
Indeed the TextDisplay _is_ able to display HTML; i.e.
```julia
julia> display("text/html", html"Hello
")
Hello
```
so this is not really a bug. (Although this display is not so useful.) The reason the MethodError occurs is because `String` cannot be displayed as HTML.
---
**Author:**  [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [February 17, 2017, 4:21pm UTC](https://discourse.julialang.org/t/possibly-incorrect-displayable-text-html-in-v0-6/2145/4 "2017-02-17T16:21:17Z")
I see, thanks. I’ll fix that in Interact.