Strapi graphql mutation Syntax Error: Unterminated string - vue.js

Question

I always get Syntax Error: Unterminated string when I try to update my database using javascript strapi sdk. this.chapter.content is a html string generated by ckeditor. How can I escape this string to update my database using graphql?
async updateChapter() {
const q = `
mutation {
updateChapter(input: {
where: {
id: "${this.$route.params.chapterId}"
},
data: {
content: "${this.chapter.content.replace(/[.*+?^${}()|[\]\\]/g, '\\$&').replace(/(?:\r\n|\r|\n)/g, '\n')}"
title: "${this.chapter.title}"
}
}) {
chapter{
title
id
content
}
}
}
`;
const res = await strapi.request("post", "/graphql", {
data: {
query: q
}
});
this.chapter = res.data.chapter;
}

Answer 1

Technically you could use block string notation to get around this issue. However, you really should supply dynamic input values using variables instead of string interpolation. This way you can easily provide any of sort of values (strings, numbers, objects, etc.) and GraphQL will parse them accordingly -- including strings with line breaks.
const query = `
mutation MyMutation ($chapterId: ID!, $content: String!, $title: String!) {
updateChapter(input: {
where: {
id: $chapterId
},
data: {
content: $content
title: $title
}
}) {
chapter{
title
id
content
}
}
}
`
const variables = {
chapterId: '...',
content: '...',
title: '...',
}
const res = await strapi.request("post", "/graphql", {
data: {
query,
variables,
},
})
Note that $chapterId may need to be of the type String! instead if that's what's called for in the schema. Since variables can also be input object types, instead of providing 3 different variables, you could also provide a single variable to be passed to the input argument instead:
const query = `
mutation MyMutation ($input: SomeInputObjectTypeHere!) {
updateChapter(input: $input) {
chapter{
title
id
content
}
}
}
`
const variables = {
input: {
where: {
id: '...',
},
data: {
content: '...',
title: '...',
},
},
}
Again, just replace SomeInputObjectTypeHere with the appropriate type in your schema.

Answer 2

Another solution maybe help
Code with issue: For example mainReason and actionTaken fields are text inputs and data contains some white spaces. This action give error: Unterminated string
mutation { updateApplicationForm(input:{ where:{id:"${ticketData.id}"}
data:{
mainReason: "${ticketData.mainReason}"
actionTaken: "${ticketData.actionTaken}"
appStatus: ${ticketData.appStatus}
action: "${ticketData.action}"
}
Fix this problem with JSON.stringify method
mutation { updateApplicationForm(input:{ where:{id:"${ticketData.id}"}
data:{
mainReason:${JSON.stringify(ticketData.mainReason)}
actionTaken:${JSON.stringify(ticketData.actionTaken)}
appStatus: ${ticketData.appStatus}
action: "${ticketData.action}"
}