I have a string array, which I want to compare with a text string, if it finds similarities I want to be able to mark in black the similarity found within the string

example:

context.body: 'G-22-6-04136 - PatientName1'

newBody: ['G-22-6-04136 - PatientName1' , 'G-22-6-04137 - PatientName2']

When finding the similarity between the two the result would be something like this

newBody: [**'G-22-6-04136 - PatientName1'** , 'G-22-6-04137 - PatientName2']

How could I do it? Is this possible to do? In advance thank you very much for the help

const totalSize: number = this.getSizeFromAttachments(attachments);
const chunkSplit = Math.floor(isNaN(totalSize) ? 1 : totalSize / this.LIMIT_ATTACHMENTS) + 1; 
const attachmentsChunk: any[][] = _.chunk(attachments, chunkSplit);

if ((totalSize > this.LIMIT_ATTACHMENTS) && attachmentsChunk?.length >= 1) {
   
    const result = attachment.map(element => this.getCantidad.find(y => element.content === y.content))
            const aux = this.namePatient
            const ans = [] 
            result.forEach(ele => {
              const expected_key = ele["correlative_soli"];
              if (aux[expected_key]) {
                const newItem = { ...ele };
                newItem["name_Patient"] = aux[expected_key]
                newItem["fileName"] = `${expected_key}${aux[expected_key] ? ' - ' + aux[expected_key] : null}\n`.replace(/\n/g, '<br />')
                ans.push(newItem)
              }
            });
            
            let newBody: any;
            const resultFilter = attachment.map(element => element.content);

            const newArr = [];
            ans.filter(element => {
              if (resultFilter.includes(element.content)) {
                newArr.push({
                  fileNameC: element.fileName
                })
              }
            })

            newBody = `• ${newArr.map(element => element.fileNameC)}`;

            const date = this.cleanDateSolic;
            const amoung= attachmentsChunk?.length;
            const getCurrent = `(${index}/${attachmentsChunk?.length})`
            const header = `${this.cleanDateSolic} pront ${attachmentsChunk?.length} mail. This is the (${index}/${attachmentsChunk?.length})`;

            console.log('body', context.body);
   
           // context.body is the body I receive of frontend like a string

            const newContext = {
              newDate: date,
              amoung: amoung,
              getCurrent: getCurrent,
              newBody: newBody,
              ...context
            }
 
            return this.prepareEmail({
              to: to,
              subject: ` ${subject} (Correo ${index}/${attachmentsChunk?.length})`,
              template: template,
              context: newContext,
            }, attachment);
 
}