Question

如果选中复选框并且textarea为空，我想更改textarea的样式。应出现红色边框。

如果textarea不为空并且未选中复选框，则边框应消失。

我尝试过类似的东西，但即使textarea不为空，也会显示边框。

<input style="display: inline;" id="checkbox1" type="checkbox" ng-model="checked">

<textarea name="" id="" cols="5" rows="3" ng-model="comments" ng-disabled="request.disableTransfer" ng-pattern="/^[0-9A-Za-z]*$/" ng-required="checked"></textarea>

这是css部分：

textarea.ng-invalid {
    border: 3px solid #cc4b37 !important;
}

Answer 1

怎么样？

  .invalid-input {
    border: 3px solid #cc4b37 !important;
}  



<textarea ng-class="{'invalid-input': (!comments || comments == '' )&& checked }" id="" cols="5" rows="3" ng-model="comments"
 ng-disabled="request.disableTransfer" ng-pattern="/^[0-9A-Za-z]*$/" ng-required="checked"></textarea>

Answer 2

它按照您的要求工作......

1。如果复选框已选中且文本区域为空。红色边框应显示。

2。如果textarea不是为空且复选框未选中，则边框应消失。

你能指出错误吗？

import itertools
from collections import Counter
image_info = [
{
    "id" : "34694102243_3370955cf9_z",
    "title" : "Eastern",
    "flickr_user" : "Sean Davis",
    "tags" : ["Los Angeles", "California", "building"]
},
{
    "id" : "37198655640_b64940bd52_z",
    "title" : "Spreetunnel",
    "flickr_user" : "Jens-Olaf Walter",
    "tags" : ["Berlin", "Germany", "tunnel", "ceiling"]
},
{
    "id" : "34944112220_de5c2684e7_z",
    "title" : "View from our rental",
    "flickr_user" : "Doug Finney",
    "tags" : ["Mexico", "ocean", "beach", "palm"]
},
{
    "id" : "36140096743_df8ef41874_z",
    "title" : "Someday",
    "flickr_user" : "Thomas Hawk",
    "tags" : ["Los Angeles", "Hollywood", "California", "Volkswagen", "Beatle", "car"]
}
]

my_counter = 0
search = "CAT IN BUILding california"
search = set(search.lower().split())
matches = {}

index = {}


# Building a rudimentary search index
for info in image_info:
    bag = info["title"].lower().split(" ")
    tags = [t.lower().split(" ") for t in info["tags"]] # we want to be able to hit "los angeles" as will as "los"  and "angeles"
    tags = list(itertools.chain.from_iterable(tags))
    for k in (bag + tags):
        if k in index:
            index[k].append(info["id"])
        else:
            index[k] = [info["id"]]

#print(index)

hits = []

for s in search:
    if s in index:
        hits += index[s]
print(Counter(hits).most_common(1)[0][0])

根据复选框更改textarea的样式

2 个答案: